cc: Use the onscreen context to perform composited ganesh filters.

cc/output/gl_renderer.h

Index: cc/output/gl_renderer.h
diff --git a/cc/output/gl_renderer.h b/cc/output/gl_renderer.h
index e776082ee2403bfe5892b95be642a82f5170964e..83879e01a908441437456d6e69aec9dc3b14326d 100644
--- a/cc/output/gl_renderer.h
+++ b/cc/output/gl_renderer.h
@@ -45,6 +45,8 @@ class ScopedEnsureFramebufferAllocation;
 // Class that handles drawing of composited render layers using GL.
 class CC_EXPORT GLRenderer : public DirectRenderer {
  public:
+  class UseGrContext;

[enne (OOO), 2014/04/23 19:53:41]

Does this need to be a nested class? Can you just hide it in the source file?

[danakj, 2014/04/23 19:56:05]

It accesses the protected output_surface_ member and RestoreGLState() methods. I
could add an accessor and make Restore..() public instead?

+
   static scoped_ptr<GLRenderer> Create(
       RendererClient* client,
       const LayerTreeSettings* settings,
@@ -216,6 +218,7 @@ class CC_EXPORT GLRenderer : public DirectRenderer {
                       bool success);
 
   void ReinitializeGLState();
+  void RestoreGLState(DrawingFrame* frame);
 
   virtual void DiscardBackbuffer() OVERRIDE;
   virtual void EnsureBackbuffer() OVERRIDE;