Optimize render passes with single quads

cc/output/gl_renderer.h

 // 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.
 
 #ifndef CC_OUTPUT_GL_RENDERER_H_
 #define CC_OUTPUT_GL_RENDERER_H_
 
 #include <deque>
 #include <vector>
 
@@ skipping 159 matching lines @@
       bool use_aa);
   std::unique_ptr<ScopedResource> GetBackdropTexture(
       const gfx::Rect& bounding_rect);
 
   static bool ShouldApplyBackgroundFilters(const RenderPassDrawQuad* quad);
   sk_sp<SkImage> ApplyBackgroundFilters(DrawingFrame* frame,
                                         const RenderPassDrawQuad* quad,
                                         ScopedResource* background_texture,
                                         const gfx::RectF& rect);
 
+  const TileDrawQuad* CanPassBeDrawnDirectly(const RenderPass* pass) override;
+
   void DrawRenderPassQuad(DrawingFrame* frame,
                           const RenderPassDrawQuad* quadi,
                           const gfx::QuadF* clip_region);
+  void DrawRenderPassQuadInternal(DrawingFrame* frame,
+                                  const RenderPassDrawQuad* quad,
+                                  const gfx::QuadF* clip_region,
+                                  const Resource* contents_texture,
+                                  bool is_render_pass_input);
   void DrawSolidColorQuad(const DrawingFrame* frame,
                           const SolidColorDrawQuad* quad,
                           const gfx::QuadF* clip_region);
   void DrawStreamVideoQuad(const DrawingFrame* frame,
                            const StreamVideoDrawQuad* quad,
                            const gfx::QuadF* clip_region);
   void DrawTextureQuad(const DrawingFrame* frame,
                        const TextureDrawQuad* quad,
                        const gfx::QuadF* clip_region);
   void EnqueueTextureQuad(const DrawingFrame* frame,
@@ skipping 331 matching lines @@
 
   SkBitmap on_demand_tile_raster_bitmap_;
   ResourceId on_demand_tile_raster_resource_id_;
   BoundGeometry bound_geometry_;
   DISALLOW_COPY_AND_ASSIGN(GLRenderer);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_GL_RENDERER_H_