[DevTools] Add dialog type and return value to Page.javascriptDialog{Opening,Closed}.

Source/core/page/ChromeClient.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple, Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 109 matching lines @@
     virtual void setResizable(bool) = 0;
 
     virtual bool shouldReportDetailedMessageForSource(LocalFrame&, const String& source) = 0;
     virtual void addMessageToConsole(LocalFrame*, MessageSource, MessageLevel, const String& message, unsigned lineNumber, const String& sourceID, const String& stackTrace) = 0;
 
     virtual bool canOpenBeforeUnloadConfirmPanel() = 0;
     bool openBeforeUnloadConfirmPanel(const String& message, LocalFrame*);
 
     virtual void closeWindowSoon() = 0;
 
-    void openJavaScriptAlert(LocalFrame*, const String&);
+    bool openJavaScriptAlert(LocalFrame*, const String&);
     bool openJavaScriptConfirm(LocalFrame*, const String&);
     bool openJavaScriptPrompt(LocalFrame*, const String& message, const String& defaultValue, String& result);
     virtual void setStatusbarText(const String&) = 0;
     virtual bool tabsToLinks() = 0;
 
     virtual void* webView() const = 0;
 
     virtual IntRect windowResizerRect() const = 0;
 
     // Methods used by HostWindow.
@@ skipping 102 matching lines @@
 
     virtual void registerPopupOpeningObserver(PopupOpeningObserver*) = 0;
     virtual void unregisterPopupOpeningObserver(PopupOpeningObserver*) = 0;
 
 protected:
     virtual ~ChromeClient() { }
 
     virtual void showMouseOverURL(const HitTestResult&) = 0;
     virtual void setWindowRect(const IntRect&) = 0;
     virtual bool openBeforeUnloadConfirmPanelDelegate(LocalFrame*, const String& message) = 0;
-    virtual void openJavaScriptAlertDelegate(LocalFrame*, const String&) = 0;
+    virtual bool openJavaScriptAlertDelegate(LocalFrame*, const String&) = 0;
     virtual bool openJavaScriptConfirmDelegate(LocalFrame*, const String&) = 0;
     virtual bool openJavaScriptPromptDelegate(LocalFrame*, const String& message, const String& defaultValue, String& result) = 0;
     virtual void printDelegate(LocalFrame*) = 0;
 
 private:
     bool canOpenModalIfDuringPageDismissal(Frame* mainFrame, DialogType, const String& message);
     void setToolTip(const HitTestResult&);
 };
 
 } // namespace blink
 
 #endif // ChromeClient_h