Add non-NNBD language version marker to all sdk (non-nnbd) files

This is practically a copy of the change in
https://dart-review.googlesource.com/c/sdk/+/118040 but applied to the non-nnbd
sdk.

Even though there is no intent to run the non-nnbd sdk with the non-nullable
experiment, we need to add this annotation because of how we
intend to gradually start testing NNBD. The libraries.json under
sdk_nnbd is allowed to point to libraries under the non-nnbd sdk in order to
temporarily build without errors until all patch files are migrated and all CFE
issues are addressed.

Change-Id: I53c1123a8d86c10695832a8a0ad35adb7b4d92fd
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/125181
Commit-Queue: Sigmund Cherem <[email protected]>
Reviewed-by: Bob Nystrom <[email protected]>

Author: sigmundch

pkg/front_end/lib/src/fasta/source/source_library_builder.dart

@@ -214,7 +214,7 @@ import 'source_loader.dart' show SourceLoader;
 
 // TODO(johnniwinther,jensj): Replace this with the correct scheme.
 const int enableNonNullableDefaultMajorVersion = 2;
-const int enableNonNullableDefaultMinorVersion = 6;
+const int enableNonNullableDefaultMinorVersion = 7;
 
 class SourceLibraryBuilder extends LibraryBuilderImpl {
   static const String MALFORMED_URI_SCHEME = "org-dartlang-malformed-uri";

pkg/front_end/testcases/general/sdk_diagnostic.dart.outline.expect

@@ -12,7 +12,7 @@ library;
 //
 // class C extends Iterable<Object> {
 //       ^
-// sdk/lib/core/iterable.dart:154:19: Context: 'Iterable.iterator' is defined here.
+// sdk/lib/core/iterable.dart:156:19: Context: 'Iterable.iterator' is defined here.
 //   Iterator<E> get iterator;
 //                   ^^^^^^^^
 //

pkg/front_end/testcases/general/sdk_diagnostic.dart.strong.expect

@@ -12,14 +12,14 @@ library;
 //
 // class C extends Iterable<Object> {
 //       ^
-// sdk/lib/core/iterable.dart:154:19: Context: 'Iterable.iterator' is defined here.
+// sdk/lib/core/iterable.dart:156:19: Context: 'Iterable.iterator' is defined here.
 //   Iterator<E> get iterator;
 //                   ^^^^^^^^
 //
 // pkg/front_end/testcases/general/sdk_diagnostic.dart:12:8: Error: Too few positional arguments: 1 required, 0 given.
 //   print(incorrectArgument: "fisk");
 //        ^
-// sdk/lib/core/print.dart:8:6: Context: Found this candidate, but the arguments don't match.
+// sdk/lib/core/print.dart:10:6: Context: Found this candidate, but the arguments don't match.
 // void print(Object object) {
 //      ^^^^^
 //

pkg/front_end/testcases/general/sdk_diagnostic.dart.strong.transformed.expect

@@ -12,14 +12,14 @@ library;
 //
 // class C extends Iterable<Object> {
 //       ^
-// sdk/lib/core/iterable.dart:154:19: Context: 'Iterable.iterator' is defined here.
+// sdk/lib/core/iterable.dart:156:19: Context: 'Iterable.iterator' is defined here.
 //   Iterator<E> get iterator;
 //                   ^^^^^^^^
 //
 // pkg/front_end/testcases/general/sdk_diagnostic.dart:12:8: Error: Too few positional arguments: 1 required, 0 given.
 //   print(incorrectArgument: "fisk");
 //        ^
-// sdk/lib/core/print.dart:8:6: Context: Found this candidate, but the arguments don't match.
+// sdk/lib/core/print.dart:10:6: Context: Found this candidate, but the arguments don't match.
 // void print(Object object) {
 //      ^^^^^
 //

runtime/bin/vmservice/loader.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 part of vmservice_io;
 
 _sanitizeWindowsPath(path) {

runtime/bin/vmservice/server.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 part of vmservice_io;
 
 final bool silentObservatory = new bool.fromEnvironment('SILENT_OBSERVATORY');

runtime/bin/vmservice/vmservice_io.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 library vmservice_io;
 
 import 'dart:async';

runtime/observatory/tests/service/step_through_mixin_from_sdk_test.dart

@@ -35,19 +35,19 @@ List<String> stops = [];
 List<String> expected = [
   "$file:${LINE + 0}:17", // on "Foo" (in "new Foo()")
   "$file:${LINE + 1}:11", // on "="
-  "list.dart:105:24", // on parameter to "contains"
-  "list.dart:106:23", // on "length" in "this.length"
-  "list.dart:107:16", // on "=" in "i = 0"
-  "list.dart:107:23", // on "<" in "i < length"
-  "list.dart:108:15", // on "[" in "this[i]"
+  "list.dart:107:24", // on parameter to "contains"
+  "list.dart:108:23", // on "length" in "this.length"
+  "list.dart:109:16", // on "=" in "i = 0"
+  "list.dart:109:23", // on "<" in "i < length"
+  "list.dart:110:15", // on "[" in "this[i]"
   "$file:${LINE + 13}:23", // on parameter in "operator []"
   "$file:${LINE + 14}:5", // on "return"
-  "list.dart:108:19", // on "=="
-  "list.dart:109:26", // on "length" in "this.length"
-  "list.dart:109:18", // on "!="
-  "list.dart:107:34", // on "++" in "i++"
-  "list.dart:107:23", // on "<" in "i < length"
-  "list.dart:113:5", // on "return"
+  "list.dart:110:19", // on "=="
+  "list.dart:111:26", // on "length" in "this.length"
+  "list.dart:111:18", // on "!="
+  "list.dart:109:34", // on "++" in "i++"
+  "list.dart:109:23", // on "<" in "i < length"
+  "list.dart:115:5", // on "return"
   "$file:${LINE + 4}:5", // on "print"
   "$file:${LINE + 6}:1" // on ending '}'
 ];

sdk/lib/_http/crypto.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 part of dart._http;
 
 class _CryptoUtils {

sdk/lib/_http/http.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 library dart._http;
 
 import 'dart:async';

sdk/lib/_http/http_date.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 part of dart._http;
 
 /**

sdk/lib/_http/http_headers.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 part of dart._http;
 
 class _HttpHeaders implements HttpHeaders {

sdk/lib/_http/http_impl.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 part of dart._http;
 
 int _nextServiceId = 1;

sdk/lib/_http/http_parser.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 part of dart._http;
 
 // Global constants.

sdk/lib/_http/http_session.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 part of dart._http;
 
 const String _DART_SESSION_ID = "DARTSESSID";

sdk/lib/_http/overrides.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 part of dart._http;
 
 final _httpOverridesToken = new Object();

sdk/lib/_http/websocket.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 part of dart._http;
 
 /**

sdk/lib/_http/websocket_impl.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 part of dart._http;
 
 const String _webSocketGUID = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";

sdk/lib/_internal/js_dev_runtime/lib/js/dart2js/js_dart2js.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 // DDC version of sdk/lib/js/dart2js/js_dart2js.dart
 
 /// Low-level support for interoperating with JavaScript.

sdk/lib/_internal/js_dev_runtime/lib/js_util/dart2js/js_util_dart2js.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 /// Utility methods to efficiently manipulate typed JSInterop objects in cases
 /// where the name to call is not known at runtime. You should only use these
 /// methods when the same effect cannot be achieved with @JS annotations.

sdk/lib/_internal/js_dev_runtime/libraries.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 library libraries;
 
 /**

sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 // Patch file for the dart:async library.
 
 import 'dart:_js_helper' show notNull, patch, ReifyFunctionTypes;

sdk/lib/_internal/js_dev_runtime/patch/cli_patch.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 import 'dart:_js_helper' show patch;
 
 @patch

sdk/lib/_internal/js_dev_runtime/patch/collection_patch.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 // Patch file for dart:collection classes.
 import 'dart:_foreign_helper' show JS, JSExportName;
 import 'dart:_runtime' as dart;

sdk/lib/_internal/js_dev_runtime/patch/convert_patch.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 // Patch file for dart:convert library.
 
 import 'dart:_js_helper' show argumentErrorValue, patch;

sdk/lib/_internal/js_dev_runtime/patch/core_patch.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 // Patch file for dart:core classes.
 import "dart:_internal" as _symbol_dev;
 import 'dart:_interceptors';

sdk/lib/_internal/js_dev_runtime/patch/developer_patch.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 // Patch file for dart:developer library.
 
 import 'dart:_js_helper' show patch, ForceInline, ReifyFunctionTypes;

sdk/lib/_internal/js_dev_runtime/patch/internal_patch.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 import 'dart:core' hide Symbol;
 import 'dart:core' as core show Symbol;
 import 'dart:_js_primitives' show printString;

sdk/lib/_internal/js_dev_runtime/patch/io_patch.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 import 'dart:_js_helper' show patch;
 import 'dart:async';
 import 'dart:convert';

sdk/lib/_internal/js_dev_runtime/patch/isolate_patch.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 // Patch file for the dart:isolate library.
 
 import 'dart:_js_helper' show patch, NoReifyGeneric;

sdk/lib/_internal/js_dev_runtime/patch/math_patch.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 // Patch file for dart:math library.
 import 'dart:_foreign_helper' show JS;
 import 'dart:_js_helper' show patch, nullCheck, notNull;

sdk/lib/_internal/js_dev_runtime/patch/mirrors_patch.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 // Patch library for dart:mirrors.
 
 import 'dart:_js_helper' show patch;

sdk/lib/_internal/js_dev_runtime/patch/typed_data_patch.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 import 'dart:collection';
 import 'dart:_js_helper' show patch;
 import 'dart:_native_typed_data';

sdk/lib/_internal/js_dev_runtime/private/annotations.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 part of dart._js_helper;
 
 /// Tells the optimizing compiler to always inline the annotated method.

sdk/lib/_internal/js_dev_runtime/private/custom_hash_map.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 part of dart._js_helper;
 
 class CustomKeyHashMap<K, V> extends CustomHashMap<K, V> {

sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/classes.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 /// This library defines the operations that define and manipulate Dart
 /// classes.  Included in this are:
 ///   - Generics

sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 part of dart._runtime;
 
 // We need to set these properties while the sdk is only partially initialized

sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 /// This library defines runtime operations on objects used by the code
 /// generator.
 part of dart._runtime;

sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/rtti.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 /// This library defines the association between runtime objects and
 /// runtime types.
 part of dart._runtime;

sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/runtime.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+// @dart = 2.6
+
 @ReifyFunctionTypes(false)
 library dart._runtime;