Fire visibilityChange event on out-of-process iframes.

third_party/WebKit/Source/web/WebViewImpl.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 82 matching lines @@
 class WebRemoteFrame;
 class WebSelection;
 class WebSettingsImpl;
 class WebViewScheduler;
 
 class WEB_EXPORT WebViewImpl final : WTF_NON_EXPORTED_BASE(public WebView)
     , public RefCounted<WebViewImpl>
     , WTF_NON_EXPORTED_BASE(public WebGestureCurveTarget)
     , public PageWidgetEventHandler {
 public:
-    static WebViewImpl* create(WebViewClient*);
+    static WebViewImpl* create(WebViewClient*, bool);
     static HashSet<WebViewImpl*>& allInstances();
 
     // WebWidget methods:
     void close() override;
     WebSize size() override;
     void resize(const WebSize&) override;
     void resizeVisualViewport(const WebSize&) override;
     void didEnterFullScreen() override;
     void didExitFullScreen() override;
 
@@ skipping 435 matching lines @@
 
     friend class WebView;  // So WebView::Create can call our constructor
     friend class WTF::RefCounted<WebViewImpl>;
     friend void setCurrentInputEventForTest(const WebInputEvent*);
 
     enum DragAction {
       DragEnter,
       DragOver
     };
 
-    explicit WebViewImpl(WebViewClient*);
+    explicit WebViewImpl(WebViewClient*, bool);
     ~WebViewImpl() override;
 
     int textInputFlags();
 
     WebString inputModeOfFocusedElement();
 
     // Returns true if the event was actually processed.
     bool keyEventDefault(const WebKeyboardEvent&);
 
     bool confirmComposition(const WebString& text, ConfirmCompositionBehavior);
@@ skipping 197 matching lines @@
     double m_lastFrameTimeMonotonic;
 };
 
 // We have no ways to check if the specified WebView is an instance of
 // WebViewImpl because WebViewImpl is the only implementation of WebView.
 DEFINE_TYPE_CASTS(WebViewImpl, WebView, webView, true, true);
 
 } // namespace blink
 
 #endif