Introduce CompositorDependencies for RenderWidgetCompositor.

cc/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 component("cc") {
   sources = [
     "animation/animation.cc",
     "animation/animation.h",
     "animation/animation_curve.cc",
     "animation/animation_curve.h",
@@ skipping 533 matching lines @@
     "test/fake_content_layer.cc",
     "test/fake_content_layer.h",
     "test/fake_content_layer_client.cc",
     "test/fake_content_layer_client.h",
     "test/fake_content_layer_impl.cc",
     "test/fake_content_layer_impl.h",
     "test/fake_delegated_renderer_layer.cc",
     "test/fake_delegated_renderer_layer.h",
     "test/fake_delegated_renderer_layer_impl.cc",
     "test/fake_delegated_renderer_layer_impl.h",
+    "test/fake_external_begin_frame_source.cc",
+    "test/fake_external_begin_frame_source.h",
     "test/fake_impl_proxy.h",
     "test/fake_layer_tree_host.cc",
     "test/fake_layer_tree_host.h",
     "test/fake_layer_tree_host_client.cc",
     "test/fake_layer_tree_host_client.h",
     "test/fake_layer_tree_host_impl.cc",
     "test/fake_layer_tree_host_impl.h",
     "test/fake_layer_tree_host_impl_client.cc",
     "test/fake_layer_tree_host_impl_client.h",
     "test/fake_output_surface.cc",
@@ skipping 311 matching lines @@
     "//media",
     "//skia",
     "//testing/gmock",
     "//testing/gtest",
     "//testing/perf",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/gl",
   ]
 }