Update from https://crrev.com/306724

cc/trees/layer_tree_host.h

 // 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.
 
 #ifndef CC_TREES_LAYER_TREE_HOST_H_
 #define CC_TREES_LAYER_TREE_HOST_H_
 
 #include <limits>
 #include <list>
 #include <set>
@@ skipping 48 matching lines @@
 class Region;
 class RenderingStatsInstrumentation;
 class ResourceProvider;
 class ResourceUpdateQueue;
 class SharedBitmapManager;
 class TopControlsManager;
 class UIResourceRequest;
 struct PendingPageScaleAnimation;
 struct RenderingStats;
 struct ScrollAndScaleSet;
+enum class GpuRasterizationStatus;
 
 // Provides information on an Impl's rendering capabilities back to the
 // LayerTreeHost.
 struct CC_EXPORT RendererCapabilities {
   RendererCapabilities(ResourceFormat best_texture_format,
                        bool allow_partial_texture_updates,
                        int max_texture_size,
                        bool using_shared_memory_resources);
 
   RendererCapabilities();
@@ skipping 122 matching lines @@
   const LayerTreeSettings& settings() const { return settings_; }
 
   void SetDebugState(const LayerTreeDebugState& debug_state);
   const LayerTreeDebugState& debug_state() const { return debug_state_; }
 
   bool has_gpu_rasterization_trigger() const {
     return has_gpu_rasterization_trigger_;
   }
   void SetHasGpuRasterizationTrigger(bool has_trigger);
   bool UseGpuRasterization() const;
+  GpuRasterizationStatus GetGpuRasterizationStatus() const;
 
   void SetViewportSize(const gfx::Size& device_viewport_size);
   void SetTopControlsLayoutHeight(float height);
   void SetTopControlsContentOffset(float offset);
 
   gfx::Size device_viewport_size() const { return device_viewport_size_; }
 
   void ApplyPageScaleDeltaFromImplSide(float page_scale_delta);
   void SetPageScaleFactorAndLimits(float page_scale_factor,
                                    float min_page_scale_factor,
@@ skipping 256 matching lines @@
 
   uint32_t surface_id_namespace_;
   uint32_t next_surface_sequence_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHost);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_H_