Expose the WebGraphicsContext3D for Android

content/public/browser/android/compositor.h

Index: content/public/browser/android/compositor.h
diff --git a/content/public/browser/android/compositor.h b/content/public/browser/android/compositor.h
index 9019e4776ba3d7ba56a878e41ea89d858398962a..b064495c45330fd18fc6c209b768452f25e944f6 100644
--- a/content/public/browser/android/compositor.h
+++ b/content/public/browser/android/compositor.h
@@ -11,6 +11,7 @@
 #include "ui/gfx/size.h"
 
 namespace WebKit {
+class WebGraphicsContext3D;
 class WebLayer;
 }
 
@@ -42,6 +43,10 @@ class Compositor {
   // The buffer is not modified if false is returned.
   virtual bool CompositeAndReadback(void *pixels, const gfx::Rect& rect) = 0;
 
+  // Gives a pointer to the current WebGraphicsContext3D.  Should not be stored
+  // by the caller.
+  virtual WebKit::WebGraphicsContext3D* GetContext3D() = 0;
+
   // Callback to be run after the frame has been drawn. It passes back
   // a synchronization point identifier.
   typedef base::Callback<void(uint32)> SurfacePresentedCallback;