Add flag for drawing layers to screen with Ganesh

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 66f08af3f89567270221fc2938f9c22284429843..bc231089704a395d73c0d5a7ed6d767cf479fc32 100644
--- a/cc/output/gl_renderer.h
+++ b/cc/output/gl_renderer.h
@@ -19,6 +19,7 @@
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsMemoryAllocation.h"
 #include "ui/gfx/quad_f.h"
+#include "webkit/gpu/grcontext_for_webgraphicscontext3d.h"
 
 namespace cc {
 
@@ -141,6 +142,8 @@ class CC_EXPORT GLRenderer
                         const YUVVideoDrawQuad* quad);
   void DrawPictureQuad(const DrawingFrame* frame,
                        const PictureDrawQuad* quad);
+  void DrawPictureQuadDirectToBackbuffer(const DrawingFrame* frame,
+                                         const PictureDrawQuad* quad);
 
   void SetShaderOpacity(float opacity, int alpha_location);
   void SetShaderQuadF(const gfx::QuadF& quad, int quad_location);
@@ -177,6 +180,11 @@ class CC_EXPORT GLRenderer
   bool InitializeSharedObjects();
   void CleanupSharedObjects();
 
+  void ReinitializeGrContext();
+  void ReinitializeGLState();
+
+  bool CanUseGanesh() const;
+
   // WebKit::
   // WebGraphicsContext3D::WebGraphicsMemoryAllocationChangedCallbackCHROMIUM
   // implementation.
@@ -353,6 +361,8 @@ class CC_EXPORT GLRenderer
 
   OutputSurface* output_surface_;
   WebKit::WebGraphicsContext3D* context_;
+  scoped_ptr<webkit::gpu::GrContextForWebGraphicsContext3D> gr_context_;
+  SkAutoTUnref<SkCanvas> sk_canvas_;
 
   gfx::Rect swap_buffer_rect_;
   gfx::Rect scissor_rect_;