Update from https://crrev.com/320343

cc/output/direct_renderer.h

Index: cc/output/direct_renderer.h
diff --git a/cc/output/direct_renderer.h b/cc/output/direct_renderer.h
index e07cb932e5aff6a1661596ce401a4c365443d441..3399491c058f42e87585f1dffebb5a793b136257 100644
--- a/cc/output/direct_renderer.h
+++ b/cc/output/direct_renderer.h
@@ -9,13 +9,17 @@
 #include "base/callback.h"
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "cc/base/cc_export.h"
+#include "cc/base/scoped_ptr_deque.h"
 #include "cc/output/overlay_processor.h"
 #include "cc/output/renderer.h"
 #include "cc/resources/resource_provider.h"
 #include "cc/resources/scoped_resource.h"
+#include "cc/resources/task_graph_runner.h"
+#include "ui/gfx/geometry/quad_f.h"
 
 namespace cc {
 
+class DrawPolygon;
 class ResourceProvider;
 
 // This is the base class for code shared between the GL and software
@@ -56,6 +60,10 @@ class CC_EXPORT DirectRenderer : public Renderer {
   };
 
   void SetEnlargePassTextureAmountForTesting(const gfx::Vector2d& amount);
+  void DoDrawPolygon(const DrawPolygon& poly,
+                     DrawingFrame* frame,
+                     const gfx::Rect& render_pass_scissor,
+                     bool using_scissor_as_optimization);
 
  protected:
   DirectRenderer(RendererClient* client,
@@ -78,16 +86,21 @@ class CC_EXPORT DirectRenderer : public Renderer {
   gfx::Rect DeviceClipRectInWindowSpace(const DrawingFrame* frame) const;
   static gfx::Rect ComputeScissorRectForRenderPass(const DrawingFrame* frame);
   void SetScissorStateForQuad(const DrawingFrame* frame, const DrawQuad& quad);
+  bool ShouldSkipQuad(const DrawQuad& quad,
+                      const gfx::Rect& render_pass_scissor);
   void SetScissorStateForQuadWithRenderPassScissor(
       const DrawingFrame* frame,
       const DrawQuad& quad,
-      const gfx::Rect& render_pass_scissor,
-      bool* should_skip_quad);
+      const gfx::Rect& render_pass_scissor);
   void SetScissorTestRectInDrawSpace(const DrawingFrame* frame,
                                      const gfx::Rect& draw_space_rect);
 
   static gfx::Size RenderPassTextureSize(const RenderPass* render_pass);
 
+  void FlushPolygons(ScopedPtrDeque<DrawPolygon>* poly_list,
+                     DrawingFrame* frame,
+                     const gfx::Rect& render_pass_scissor,
+                     bool using_scissor_as_optimization);
   void DrawRenderPass(DrawingFrame* frame, const RenderPass* render_pass);
   bool UseRenderPass(DrawingFrame* frame, const RenderPass* render_pass);
 
@@ -101,7 +114,12 @@ class CC_EXPORT DirectRenderer : public Renderer {
                              bool draw_rect_covers_full_surface) = 0;
   virtual void ClearFramebuffer(DrawingFrame* frame,
                                 bool has_external_stencil_test) = 0;
-  virtual void DoDrawQuad(DrawingFrame* frame, const DrawQuad* quad) = 0;
+  // clip_region is a (possibly null) pointer to a quad in the same
+  // space as the quad. When non-null only the area of the quad that overlaps
+  // with clip_region will be drawn.
+  virtual void DoDrawQuad(DrawingFrame* frame,
+                          const DrawQuad* quad,
+                          const gfx::QuadF* clip_region) = 0;
   virtual void BeginDrawingFrame(DrawingFrame* frame) = 0;
   virtual void FinishDrawingFrame(DrawingFrame* frame) = 0;
   virtual void FinishDrawingQuadList();