Fix UpdateTilePriorities viewport in Android WebView.

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"
@@ skipping 71 matching lines @@
   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,
                           gfx::Rect draw_rect,
                           gfx::Rect viewport_rect,
                           gfx::Size surface_size);
   gfx::Rect MoveFromDrawToWindowSpace(const gfx::RectF& draw_rect) const;
 
+  bool NeedDeviceClip(const DrawingFrame* frame) const;
+  gfx::Rect DeviceClipRect(const DrawingFrame* frame) const;
   static gfx::RectF ComputeScissorRectForRenderPass(const DrawingFrame* frame);
   void SetScissorStateForQuad(const DrawingFrame* frame, const DrawQuad& quad);
   void SetScissorStateForQuadWithRenderPassScissor(
       const DrawingFrame* frame,
       const DrawQuad& quad,
       const gfx::RectF& render_pass_scissor,
       bool* should_skip_quad);
+  void SetScissorTestRectInDrawSpace(const DrawingFrame* frame,
+                                     gfx::RectF draw_space_rect);
 
   static gfx::Size RenderPassTextureSize(const RenderPass* render_pass);
   static GLenum RenderPassTextureFormat(const RenderPass* render_pass);
 
   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,
@@ skipping 30 matching lines @@
 
  private:
   gfx::Vector2d enlarge_pass_texture_amount_;
 
   DISALLOW_COPY_AND_ASSIGN(DirectRenderer);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_DIRECT_RENDERER_H_