Enable texture readback support for Android

content/browser/renderer_host/image_transport_factory_android.h

Index: content/browser/renderer_host/image_transport_factory_android.h
diff --git a/content/browser/renderer_host/image_transport_factory_android.h b/content/browser/renderer_host/image_transport_factory_android.h
index 42855c7346d5007ec2962a3474162a7654bb0008..f4b7a6264d74415ed16b336b1dbde7b1f9c12cb8 100644
--- a/content/browser/renderer_host/image_transport_factory_android.h
+++ b/content/browser/renderer_host/image_transport_factory_android.h
@@ -8,10 +8,16 @@
 #include "base/memory/scoped_ptr.h"
 #include "ui/gfx/native_widget_types.h"
 
+namespace WebKit {
+  class WebGraphicsContext3D;
+}
+
 class WebGraphicsContext3DCommandBufferImpl;
 
 namespace content {
 
+class GLHelper;
+
 class ImageTransportFactoryAndroid {
  public:
   ImageTransportFactoryAndroid();
@@ -24,9 +30,12 @@ class ImageTransportFactoryAndroid {
 
   uint32_t InsertSyncPoint();
 
-  WebGraphicsContext3DCommandBufferImpl* GetContext3D();
+  WebKit::WebGraphicsContext3D* GetContext3D();
+  GLHelper* GetGLHelper();
+
  private:
   scoped_ptr<WebGraphicsContext3DCommandBufferImpl> context_;
+  scoped_ptr<GLHelper> gl_helper_;
 };
 
 }  // namespace content