Implement transform/clip support for Android WebView.

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 4baadeecbfbfd34f7312747441ae2abda5f3c2d8..562b4a8e745f8ce9f30fcc0fd3ac7fea0d6a0230 100644
--- a/cc/output/direct_renderer.h
+++ b/cc/output/direct_renderer.h
@@ -50,7 +50,9 @@ class CC_EXPORT DirectRenderer : public Renderer {
   void SetEnlargePassTextureAmountForTesting(gfx::Vector2d amount);
 
  protected:
-  DirectRenderer(RendererClient* client, ResourceProvider* resource_provider);
+  DirectRenderer(RendererClient* client,
+                 OutputSurface* output_surface,
+                 ResourceProvider* resource_provider);
 
   class CachedResource : public ScopedResource {
    public:
@@ -80,9 +82,10 @@ class CC_EXPORT DirectRenderer : public Renderer {
                                 const gfx::RectF& quad_rect);
   static void InitializeMatrices(DrawingFrame* frame,
                                  gfx::Rect draw_rect,
+                                 gfx::Rect window_rect,
                                  bool flip_y);
-  static gfx::Rect MoveScissorToWindowSpace(const DrawingFrame* frame,
-                                            const gfx::RectF& scissor_rect);
+  gfx::Rect MoveScissorToWindowSpace(const DrawingFrame* frame,
+                                     const gfx::RectF& scissor_rect);
   static gfx::RectF ComputeScissorRectForRenderPass(const DrawingFrame* frame);
   void SetScissorStateForQuad(const DrawingFrame* frame, const DrawQuad& quad);
   void SetScissorStateForQuadWithRenderPassScissor(
@@ -100,8 +103,8 @@ class CC_EXPORT DirectRenderer : public Renderer {
   virtual void BindFramebufferToOutputSurface(DrawingFrame* frame) = 0;
   virtual bool BindFramebufferToTexture(DrawingFrame* frame,
                                         const ScopedResource* resource,
-                                        gfx::Rect framebuffer_rect) = 0;
-  virtual void SetDrawViewportSize(gfx::Size viewport_size) = 0;
+                                        gfx::Rect target_rect) = 0;
+  virtual void SetDrawViewport(gfx::Rect viewport) = 0;
   virtual void SetScissorTestRect(gfx::Rect scissor_rect) = 0;
   virtual void ClearFramebuffer(DrawingFrame* frame) = 0;
   virtual void DoDrawQuad(DrawingFrame* frame, const DrawQuad* quad) = 0;
@@ -117,6 +120,7 @@ class CC_EXPORT DirectRenderer : public Renderer {
       scoped_ptr<CopyOutputRequest> request) = 0;
 
   ScopedPtrHashMap<RenderPass::Id, CachedResource> render_pass_textures_;
+  OutputSurface* output_surface_;
   ResourceProvider* resource_provider_;
 
  private: