Notifying the Out of Process Renderer about Visibility Change of a Remote Frame

content/browser/renderer_host/render_widget_host_delegate.h

Index: content/browser/renderer_host/render_widget_host_delegate.h
diff --git a/content/browser/renderer_host/render_widget_host_delegate.h b/content/browser/renderer_host/render_widget_host_delegate.h
index e9c043e92ab13e9c51a78bc09995f8cdcf71cac1..5830dcc2faf143db7790ea919c49948fc534bf95 100644
--- a/content/browser/renderer_host/render_widget_host_delegate.h
+++ b/content/browser/renderer_host/render_widget_host_delegate.h
@@ -105,6 +105,10 @@ class CONTENT_EXPORT RenderWidgetHostDelegate {
   // current FrameTree, not including the main frame's SiteInstance.
   virtual void ReplicatePageFocus(bool is_focused) {}
 
+  // If there is a guest WebContents, it should be notified of the visibility
+  // change.
+  virtual void ForwardVisibilityChangeToInnerContents(bool visible) {}

[dcheng, 2015/12/02 00:15:05]

What will this method be used for? It seems a bit weird to plumb it through
RWHD, and it doesn't seem like it's actually used.

[EhsanK, 2015/12/07 16:10:15]

This method is being called in cross_process_frame_connector.cc.

This will be implemented by WebContentsImpl. It will later be used for <webview>
to forward the change in visibility state to the Guest/Inner(?) WebContents.

+
 #if defined(OS_WIN)
   virtual gfx::NativeViewAccessible GetParentNativeViewAccessible();
 #endif