Replace source pointer in cc::CopyOutputRequest with a base::UnguessableToken

content/browser/renderer_host/render_widget_host_view_frame_subscriber.h

Index: content/browser/renderer_host/render_widget_host_view_frame_subscriber.h
diff --git a/content/public/browser/render_widget_host_view_frame_subscriber.h b/content/browser/renderer_host/render_widget_host_view_frame_subscriber.h
similarity index 89%
rename from content/public/browser/render_widget_host_view_frame_subscriber.h
rename to content/browser/renderer_host/render_widget_host_view_frame_subscriber.h
index 6485c7da64809c1ef4b5c83b3e4c8131ed3b4259..e88effe55e2260fc90d86303004d83055e4d7930 100644
--- a/content/public/browser/render_widget_host_view_frame_subscriber.h
+++ b/content/browser/renderer_host/render_widget_host_view_frame_subscriber.h
@@ -2,11 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_VIEW_FRAME_SUBSCRIBER_H_
-#define CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_VIEW_FRAME_SUBSCRIBER_H_
+#ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_FRAME_SUBSCRIBER_H_
+#define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_FRAME_SUBSCRIBER_H_
 
 #include "base/callback.h"
 #include "base/time/time.h"
+#include "cc/output/copy_output_request.h"
 
 namespace gfx {
 class Rect;
@@ -68,8 +69,10 @@ class RenderWidgetHostViewFrameSubscriber {
                                   base::TimeTicks present_time,
                                   scoped_refptr<media::VideoFrame>* storage,
                                   DeliverFrameCallback* callback) = 0;
+
+  virtual const base::UnguessableToken& GetSourceIdForCopyRequest() = 0;
 };
 
 }  // namespace content
 
-#endif  // CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_VIEW_FRAME_SUBSCRIBER_H_
+#endif // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_FRAME_SUBSCRIBER_H_