Tab Capture: Backing store readbacks to YV12 VideoFrames.

content/browser/renderer_host/render_widget_host_impl.h

Index: content/browser/renderer_host/render_widget_host_impl.h
diff --git a/content/browser/renderer_host/render_widget_host_impl.h b/content/browser/renderer_host/render_widget_host_impl.h
index bd228ac9fc36ae0c79e185a36c93ccf08a357b7f..d667efe09cd8e9cdc2aef38ccba2711b8b94aa2e 100644
--- a/content/browser/renderer_host/render_widget_host_impl.h
+++ b/content/browser/renderer_host/render_widget_host_impl.h
@@ -118,6 +118,11 @@ class CONTENT_EXPORT RenderWidgetHostImpl : virtual public RenderWidgetHost,
   virtual bool CopyFromBackingStoreToCGContext(const CGRect& dest_rect,
                                                CGContextRef target) OVERRIDE;
 #endif
+  virtual bool CanCopyToVideoFrame() const OVERRIDE;
+  virtual void CopyFromBackingStoreToVideoFrame(
+      const gfx::Rect& src_rect,
+      const gfx::Size& dst_size,
+      const base::Callback<void(media::VideoFrame*)>& callback) OVERRIDE;
   virtual void EnableFullAccessibilityMode() OVERRIDE;
   virtual void ForwardMouseEvent(
       const WebKit::WebMouseEvent& mouse_event) OVERRIDE;