Add occlusion support to WebContentsImpl and RenderWidgetHostView

content/browser/web_contents/web_contents_impl.h

Index: content/browser/web_contents/web_contents_impl.h
diff --git a/content/browser/web_contents/web_contents_impl.h b/content/browser/web_contents/web_contents_impl.h
index 7158107865011d236000085bb8e4eb80501a9868..657dcb07e9c452fa7005d81ecfdaebf912f99743 100644
--- a/content/browser/web_contents/web_contents_impl.h
+++ b/content/browser/web_contents/web_contents_impl.h
@@ -182,6 +182,12 @@ class CONTENT_EXPORT WebContentsImpl
 
   bool should_normally_be_visible() { return should_normally_be_visible_; }
 
+  // Indicate if the window has been occluded, and pass this to the views, only
+  // if there is no active capture going on (otherwise it is dropped on the
+  // floor).
+  void WasOccluded();
+  void WasUnOccluded();
+
   // Broadcasts the mode change to all frames.
   void SetAccessibilityMode(AccessibilityMode mode);