cc : Store surface layer ids on LayerTreeHost and push them at commit

cc/trees/layer_tree_host_impl_unittest.cc

 // Copyright 2011 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.
 
 #include "cc/trees/layer_tree_host_impl.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <cmath>
@@ skipping 3445 matching lines @@
 // This test verifies that only SurfaceLayers in the viewport are included
 // in CompositorFrameMetadata's |activation_dependencies|.
 TEST_F(LayerTreeHostImplTest, EmbeddedSurfacesInMetadata) {
   SetupScrollAndContentsLayers(gfx::Size(100, 100));
   host_impl_->SetViewportSize(gfx::Size(50, 50));
   LayerImpl* root = host_impl_->active_tree()->root_layer_for_testing();
 
   std::vector<SurfaceId> children = {MakeSurfaceId(FrameSinkId(1, 1), 1),
                                      MakeSurfaceId(FrameSinkId(2, 2), 2),
                                      MakeSurfaceId(FrameSinkId(3, 3), 3)};
+  base::flat_set<SurfaceId> children_set;
   for (size_t i = 0; i < children.size(); ++i) {
+    children_set.insert(children[i]);
     std::unique_ptr<SurfaceLayerImpl> child =
         SurfaceLayerImpl::Create(host_impl_->active_tree(), i + 6);
     child->SetPosition(gfx::PointF(25.f * i, 0.f));
     child->SetBounds(gfx::Size(1, 1));
     child->SetDrawsContent(true);
     child->SetPrimarySurfaceInfo(
         SurfaceInfo(children[i], 1.f /* device_scale_factor */,
                     gfx::Size(10, 10) /* size_in_pixels */));
     root->test_properties()->AddChild(std::move(child));
   }
 
   host_impl_->active_tree()->BuildPropertyTreesForTesting();
+  host_impl_->active_tree()->SetSurfaceLayerIds(children_set);
   DrawFrame();
 
   FakeCompositorFrameSink* fake_compositor_frame_sink =
       static_cast<FakeCompositorFrameSink*>(
           host_impl_->compositor_frame_sink());
   const CompositorFrameMetadata& metadata =
       fake_compositor_frame_sink->last_sent_frame()->metadata;
   EXPECT_THAT(metadata.activation_dependencies,
               testing::UnorderedElementsAre(children[0], children[1]));
   EXPECT_THAT(
@@ skipping 8902 matching lines @@
 
 TEST_F(LayerTreeHostImplTest, RasterColorSpace) {
   LayerTreeSettings settings = DefaultSettings();
   settings.enable_color_correct_rasterization = true;
   CreateHostImpl(settings, CreateCompositorFrameSink());
   EXPECT_EQ(host_impl_->GetRasterColorSpace(), gfx::ColorSpace::CreateSRGB());
 }
 
 }  // namespace
 }  // namespace cc