Fire visibilityChange event on out-of-process iframes.

content/public/renderer/render_view.h

Index: content/public/renderer/render_view.h
diff --git a/content/public/renderer/render_view.h b/content/public/renderer/render_view.h
index 8c036d505a80c1be74911842fe56ad7b433ae032..3c9b94f664f967223cbb52ef61c4f50fe17d053d 100644
--- a/content/public/renderer/render_view.h
+++ b/content/public/renderer/render_view.h
@@ -14,7 +14,6 @@
 #include "content/common/content_export.h"
 #include "content/public/common/top_controls_state.h"
 #include "ipc/ipc_sender.h"
-#include "third_party/WebKit/public/platform/WebPageVisibilityState.h"
 #include "ui/gfx/geometry/rect_f.h"
 #include "ui/gfx/native_widget_types.h"
 
@@ -109,9 +108,6 @@ class CONTENT_EXPORT RenderView : public IPC::Sender {
   // false, but set to true by some tests.
   virtual bool GetContentStateImmediately() const = 0;
 
-  // Returns the current visibility of the WebView.
-  virtual blink::WebPageVisibilityState GetVisibilityState() const = 0;
-
   // Used by plugins that load data in this RenderView to update the loading
   // notifications.
   virtual void DidStartLoading() = 0;