cc: Add flag to specify to ResourceProvider to always use GMBs

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 236da9f6a3509cfc8455ec7d44e482436474f8fe..f7eef237bb9de39a121d580f439bb364ddb97845 100644
--- a/content/renderer/render_thread_impl.h
+++ b/content/renderer/render_thread_impl.h
@@ -194,6 +194,7 @@ class CONTENT_EXPORT RenderThreadImpl
   bool IsDistanceFieldTextEnabled() override;
   bool IsZeroCopyEnabled() override;
   bool IsPartialRasterEnabled() override;
+  bool IsGpuMemoryBufferCompositorResourcesEnabled() override;
   bool IsElasticOverscrollEnabled() override;
   std::vector<unsigned> GetImageTextureTargets() override;
   scoped_refptr<base::SingleThreadTaskRunner>
@@ -634,6 +635,7 @@ class CONTENT_EXPORT RenderThreadImpl
   bool is_distance_field_text_enabled_;
   bool is_zero_copy_enabled_;
   bool is_one_copy_enabled_;
+  bool is_gpu_memory_buffer_compositor_resources_enabled_;
   bool is_partial_raster_enabled_;
   bool is_elastic_overscroll_enabled_;
   std::vector<unsigned> use_image_texture_targets_;