Implement transform/clip support for Android WebView.

cc/output/output_surface.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_OUTPUT_SURFACE_H_
 #define CC_OUTPUT_OUTPUT_SURFACE_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
@@ skipping 71 matching lines @@
 
   // Sends frame data to the parent compositor. This should only be called when
   // capabilities().has_parent_compositor. The implementation may destroy or
   // steal the contents of the CompositorFrame passed in.
   virtual void SendFrameToParentCompositor(CompositorFrame* frame);
 
   virtual void EnsureBackbuffer();
   virtual void DiscardBackbuffer();
 
   virtual void Reshape(gfx::Size size, float scale_factor);
+  virtual gfx::Size SurfaceSize() const;
 
   virtual void BindFramebuffer();
 
   virtual void PostSubBuffer(gfx::Rect rect, const ui::LatencyInfo&);
   virtual void SwapBuffers(const ui::LatencyInfo&);
 
   // Notifies frame-rate smoothness preference. If true, all non-critical
   // processing should be stopped, or lowered in priority.
   virtual void UpdateSmoothnessTakesPriority(bool prefer_smoothness) {}
 
   // Requests a BeginFrame notification from the output surface. The
   // notification will be delivered by calling
   // OutputSurfaceClient::BeginFrame until the callback is disabled.
   virtual void SetNeedsBeginFrame(bool enable) {}
 
  protected:
   OutputSurfaceClient* client_;
   struct cc::OutputSurface::Capabilities capabilities_;
   scoped_ptr<WebKit::WebGraphicsContext3D> context3d_;
   scoped_ptr<cc::SoftwareOutputDevice> software_device_;
   bool has_gl_discard_backbuffer_;
+  gfx::Size surface_size_;
+  float device_scale_factor_;
 
   scoped_ptr<OutputSurfaceCallbacks> callbacks_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(OutputSurface);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_OUTPUT_SURFACE_H_