Implement transform/clip support for Android WebView.

cc/output/output_surface_client.h

Index: cc/output/output_surface_client.h
diff --git a/cc/output/output_surface_client.h b/cc/output/output_surface_client.h
index 1f188afe8fac3a3928069ebcda7e5e7c2e126603..44fd18848f9ab227ac8afaec31772a49082976ad 100644
--- a/cc/output/output_surface_client.h
+++ b/cc/output/output_surface_client.h
@@ -9,12 +9,18 @@
 #include "cc/base/cc_export.h"
 #include "ui/gfx/rect.h"
 
+namespace gfx {
+class Transform;
+}
+
 namespace cc {
 
 class CompositorFrameAck;
 
 class CC_EXPORT OutputSurfaceClient {
  public:
+  virtual void SetDeviceTransformAndClip(const gfx::Transform& transform,
+                                         gfx::Rect clip) = 0;
   virtual void SetNeedsRedrawRect(gfx::Rect damage_rect) = 0;
   virtual void OnVSyncParametersChanged(base::TimeTicks timebase,
                                         base::TimeDelta interval) = 0;