Fix bad scaling in TiledLayer

cc/layers/content_layer.cc

 // Copyright 2010 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/content_layer.h"
 
 #include "base/auto_reset.h"
 #include "base/metrics/histogram.h"
 #include "base/time/time.h"
 #include "cc/layers/content_layer_client.h"
@@ skipping 97 matching lines @@
         id());
   } else {
     updater_ = BitmapContentLayerUpdater::Create(
         painter.Pass(),
         rendering_stats_instrumentation(),
         id());
   }
   updater_->SetOpaque(contents_opaque());
   if (client_)
     updater_->SetFillsBoundsCompletely(client_->FillsBoundsCompletely());
+  updater_->SetBackgroundColor(background_color());
 
   SetTextureFormat(
       layer_tree_host()->GetRendererCapabilities().best_texture_format);
 }
 
 void ContentLayer::SetContentsOpaque(bool opaque) {
   Layer::SetContentsOpaque(opaque);
   if (updater_.get())
     updater_->SetOpaque(opaque);
 }
@@ skipping 27 matching lines @@
   return picture;
 }
 
 void ContentLayer::OnOutputSurfaceCreated() {
   SetTextureFormat(
       layer_tree_host()->GetRendererCapabilities().best_texture_format);
   TiledLayer::OnOutputSurfaceCreated();
 }
 
 }  // namespace cc