include list_libraries.dart as a snapshot for fuchsia (flutter#19567)

Author: chaselatta

shell/platform/fuchsia/BUILD.gn

@@ -45,11 +45,13 @@ if (is_fuchsia) {
     _kernel_compiler_label = "dart:kernel_compiler($host_toolchain)"
     _frontend_server_label =
         "//flutter/flutter_frontend_server:frontend_server($host_toolchain)"
+    _list_libraries_label = "dart:list_libraries($host_toolchain)"
 
     deps = [
       _frontend_server_label,
       _gen_snapshot_to_use,
       _kernel_compiler_label,
+      _list_libraries_label,
     ]
 
     _gen_snapshot_bin_path =
@@ -64,10 +66,15 @@ if (is_fuchsia) {
         rebase_path(get_label_info(_frontend_server_label, "root_gen_dir") +
                     "/frontend_server.dart.snapshot")
 
+    _list_libraries_path =
+        rebase_path(get_label_info(_list_libraries_label, "root_gen_dir") +
+                    "/list_libraries.dart.snapshot")
+
     sources = [
       _frontend_server_path,
       _gen_snapshot_bin_path,
       _kernel_compiler_path,
+      _list_libraries_path,
     ]
   }
 

shell/platform/fuchsia/dart/BUILD.gn

@@ -38,3 +38,14 @@ application_snapshot("kernel_compiler") {
 
   inputs = kernel_compiler_files
 }
+
+application_snapshot("list_libraries") {
+  main_dart = "//third_party/dart/pkg/vm/bin/list_libraries.dart"
+  training_args = [
+    # train against the dill file which is generated for this snapshot. If this build file
+    # changes location this path will need to be updated.
+    rebase_path(
+        root_gen_dir +
+        "/flutter/shell/platform/fuchsia/dart/list_libraries.dart.dill"),
+  ]
+}

tools/fuchsia/build_fuchsia_artifacts.py

@@ -115,6 +115,8 @@ def CopyGenSnapshotIfExists(source, destination):
                     destination_base, 'kernel_compiler.snapshot')
   FindFileAndCopyTo('frontend_server.dart.snapshot', source_root,
                     destination_base, 'flutter_frontend_server.snapshot')
+  FindFileAndCopyTo('list_libraries.dart.snapshot', source_root,
+                    destination_base, 'list_libraries.snapshot')
 
 
 def CopyFlutterTesterBinIfExists(source, destination):