Stub out a display list dispatcher.

Author: chinmaygarde

impeller/BUILD.gn

@@ -11,6 +11,7 @@ group("impeller") {
     "aiks",
     "base",
     "compiler",
+    "display_list",
     "entity",
     "geometry",
     "image",
@@ -25,6 +26,7 @@ executable("impeller_unittests") {
     "aiks:aiks_unittests",
     "base:base_unittests",
     "compiler:compiler_unittests",
+    "display_list:display_list_unittests",
     "entity:entity_unittests",
     "fixtures",
     "geometry:geometry_unittests",

impeller/compiler/BUILD.gn

@@ -25,7 +25,6 @@ impeller_component("compiler_lib") {
     "//flutter/fml",
     "//flutter/runtime:libdart",
     "//third_party/inja",
-    "//third_party/rapidjson",
     "//third_party/shaderc_flutter",
     "//third_party/spirv_cross_flutter",
   ]

impeller/display_list/BUILD.gn

@@ -0,0 +1,30 @@
+# Copyright 2013 The Flutter Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//flutter/impeller/tools/impeller.gni")
+
+impeller_component("display_list") {
+  sources = [
+    "display_list_impeller.cc",
+    "display_list_impeller.h",
+  ]
+
+  deps = [
+    "../aiks",
+    "//flutter/flow",
+    "//flutter/fml",
+    "//third_party/skia",
+  ]
+}
+
+impeller_component("display_list_unittests") {
+  testonly = true
+
+  sources = [ "display_list_unittests.cc" ]
+
+  deps = [
+    ":display_list",
+    "../playground",
+  ]
+}