Update from https://crrev.com/306724

cc/trees/layer_tree_impl.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_impl.h"
 
 #include <limits>
 #include <set>
 
 #include "base/debug/trace_event.h"
@@ skipping 805 matching lines @@
 }
 
 void LayerTreeImpl::DidAnimateScrollOffset() {
   layer_tree_host_impl_->DidAnimateScrollOffset();
 }
 
 bool LayerTreeImpl::use_gpu_rasterization() const {
   return layer_tree_host_impl_->use_gpu_rasterization();
 }
 
+GpuRasterizationStatus LayerTreeImpl::GetGpuRasterizationStatus() const {
+  return layer_tree_host_impl_->gpu_rasterization_status();
+}
+
 bool LayerTreeImpl::create_low_res_tiling() const {
   return layer_tree_host_impl_->create_low_res_tiling();
 }
 
 void LayerTreeImpl::SetNeedsRedraw() {
   layer_tree_host_impl_->SetNeedsRedraw();
 }
 
 const LayerTreeDebugState& LayerTreeImpl::debug_state() const {
   return layer_tree_host_impl_->debug_state();
@@ skipping 652 matching lines @@
     scoped_ptr<PendingPageScaleAnimation> pending_animation) {
   pending_page_scale_animation_ = pending_animation.Pass();
 }
 
 scoped_ptr<PendingPageScaleAnimation>
     LayerTreeImpl::TakePendingPageScaleAnimation() {
   return pending_page_scale_animation_.Pass();
 }
 
 }  // namespace cc