Update from https://crrev.com/320343

cc/output/direct_renderer.h

 // Copyright 2012 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_DIRECT_RENDERER_H_
 #define CC_OUTPUT_DIRECT_RENDERER_H_
 
 #include "base/basictypes.h"
 #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
 // renderer implementations.  "Direct" refers to the fact that it does not
 // delegate rendering to another compositor.
 class CC_EXPORT DirectRenderer : public Renderer {
  public:
   ~DirectRenderer() override;
 
   void DecideRenderPassAllocationsForFrame(
@@ skipping 20 matching lines @@
 
     gfx::Transform projection_matrix;
     gfx::Transform window_matrix;
 
     bool disable_picture_quad_image_filtering;
 
     OverlayCandidateList overlay_list;
   };
 
   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,
                  const RendererSettings* settings,
                  OutputSurface* output_surface,
                  ResourceProvider* resource_provider);
 
   static gfx::RectF QuadVertexRect();
   static void QuadRectTransform(gfx::Transform* quad_rect_transform,
                                 const gfx::Transform& quad_transform,
                                 const gfx::RectF& quad_rect);
   void InitializeViewport(DrawingFrame* frame,
                           const gfx::Rect& draw_rect,
                           const gfx::Rect& viewport_rect,
                           const gfx::Size& surface_size);
   gfx::Rect MoveFromDrawToWindowSpace(const DrawingFrame* frame,
                                       const gfx::Rect& draw_rect) const;
 
   bool NeedDeviceClip(const DrawingFrame* frame) const;
   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);
 
   virtual void BindFramebufferToOutputSurface(DrawingFrame* frame) = 0;
   virtual bool BindFramebufferToTexture(DrawingFrame* frame,
                                         const ScopedResource* resource,
                                         const gfx::Rect& target_rect) = 0;
   virtual void SetDrawViewport(const gfx::Rect& window_space_viewport) = 0;
   virtual void SetScissorTestRect(const gfx::Rect& scissor_rect) = 0;
   virtual void DiscardPixels(bool has_external_stencil_test,
                              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();
   virtual bool FlippedFramebuffer(const DrawingFrame* frame) const = 0;
   virtual void EnsureScissorTestEnabled() = 0;
   virtual void EnsureScissorTestDisabled() = 0;
   virtual void DiscardBackbuffer() {}
   virtual void EnsureBackbuffer() {}
 
   virtual void CopyCurrentRenderPassToBitmap(
@@ skipping 16 matching lines @@
 
  private:
   gfx::Vector2d enlarge_pass_texture_amount_;
 
   DISALLOW_COPY_AND_ASSIGN(DirectRenderer);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_DIRECT_RENDERER_H_