cc: Partial tile update for one-copy raster.

content/renderer/render_thread_impl.h

Index: content/renderer/render_thread_impl.h
diff --git a/content/renderer/render_thread_impl.h b/content/renderer/render_thread_impl.h
index 72316346d419e59cca763b628a826f4c729c26a1..73affc27445f73a3be912aa4da2497fa0c6f2918 100644
--- a/content/renderer/render_thread_impl.h
+++ b/content/renderer/render_thread_impl.h
@@ -192,6 +192,7 @@ class CONTENT_EXPORT RenderThreadImpl
   bool IsDistanceFieldTextEnabled() override;
   bool IsZeroCopyEnabled() override;
   bool IsOneCopyEnabled() override;
+  bool HavePersistentGpuMemoryBuffers() override;
   bool IsElasticOverscrollEnabled() override;
   uint32 GetImageTextureTarget() override;
   scoped_refptr<base::SingleThreadTaskRunner>
@@ -608,6 +609,7 @@ class CONTENT_EXPORT RenderThreadImpl
   bool is_distance_field_text_enabled_;
   bool is_zero_copy_enabled_;
   bool is_one_copy_enabled_;
+  bool have_persistent_gpu_memory_buffers_;
   bool is_elastic_overscroll_enabled_;
   unsigned use_image_texture_target_;
   bool is_gather_pixel_refs_enabled_;