Update from https://crrev.com/303153

cc/layers/picture_layer_unittest.cc

 // Copyright 2013 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/layers/picture_layer.h"
 
 #include "cc/layers/content_layer_client.h"
 #include "cc/layers/picture_layer_impl.h"
 #include "cc/resources/resource_update_queue.h"
 #include "cc/test/fake_layer_tree_host.h"
@@ skipping 25 matching lines @@
   FakeLayerTreeHostClient host_client(FakeLayerTreeHostClient::DIRECT_3D);
   scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create(&host_client);
   host->SetRootLayer(layer);
   layer->SetIsDrawable(true);
   layer->SavePaintProperties();
 
   OcclusionTracker<Layer> occlusion(gfx::Rect(0, 0, 1000, 1000));
   scoped_ptr<ResourceUpdateQueue> queue(new ResourceUpdateQueue);
   layer->Update(queue.get(), &occlusion);
 
+  EXPECT_EQ(0, host->source_frame_number());
+  host->CommitComplete();
+  EXPECT_EQ(1, host->source_frame_number());
+
   layer->SetBounds(gfx::Size(0, 0));
   layer->SavePaintProperties();
   // Intentionally skipping Update since it would normally be skipped on
   // a layer with empty bounds.
 
   FakeProxy proxy;
   {
     DebugScopedSetImplThread impl_thread(&proxy);
 
     TestSharedBitmapManager shared_bitmap_manager;
@@ skipping 39 matching lines @@
 
   // Tile-grid is set according to its setting.
   SkTileGridFactory::TileGridInfo info =
       layer->GetPicturePileForTesting()->GetTileGridInfoForTesting();
   EXPECT_EQ(info.fTileInterval.width(), 123 - 2 * info.fMargin.width());
   EXPECT_EQ(info.fTileInterval.height(), 123 - 2 * info.fMargin.height());
 }
 
 }  // namespace
 }  // namespace cc