cast: support cursor rendering for tab capture

content/browser/renderer_host/render_widget_host_view_aura.h

Index: content/browser/renderer_host/render_widget_host_view_aura.h
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.h b/content/browser/renderer_host/render_widget_host_view_aura.h
index 5bc45b667d9551c46a2bec1f17aad2f8cdd4f524..1affd43b15092c29c01fb60e86c8a4d1cb1eb1d0 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.h
+++ b/content/browser/renderer_host/render_widget_host_view_aura.h
@@ -55,6 +55,7 @@ class DelegatedFrameData;
 namespace gfx {
 class Canvas;
 class Display;
+class Rect;
 }
 
 namespace gpu {
@@ -153,7 +154,7 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
   void CopyFromCompositingSurfaceToVideoFrame(
       const gfx::Rect& src_subrect,
       const scoped_refptr<media::VideoFrame>& target,
-      const base::Callback<void(bool)>& callback) override;
+      const base::Callback<void(const gfx::Rect&, bool)>& callback) override;
   bool CanCopyToVideoFrame() const override;
   void BeginFrameSubscription(
       scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber) override;