Suppress JavaScript dialogs when a tab puts itself into fullscreen.

content/public/browser/web_contents_delegate.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_DELEGATE_H_
 
 #include <stdint.h>
 
 #include <set>
@@ skipping 165 matching lines @@
   // Invoked when a vertical overscroll completes.
   virtual void OverscrollComplete() {}
 
   // Return the rect where to display the resize corner, if any, otherwise
   // an empty rect.
   virtual gfx::Rect GetRootWindowResizerRect() const;
 
   // Invoked prior to showing before unload handler confirmation dialog.
   virtual void WillRunBeforeUnloadConfirm() {}
 
-  // Returns true if javascript dialogs and unload alerts are suppressed.
-  // Default is false.
-  virtual bool ShouldSuppressDialogs(WebContents* source);
+  // Returns true if JavaScript dialogs and onbeforeunload requests are
+  // suppressed. |before_unload| is true if the dialog is an onbeforeunload
+  // request. The default is false, to not suppress dialogs.
+  virtual bool ShouldSuppressDialogs(WebContents* source, bool before_unload);
 
   // Returns whether pending NavigationEntries for aborted browser-initiated
   // navigations should be preserved (and thus returned from GetVisibleURL).
   // Defaults to false.
   virtual bool ShouldPreserveAbortedURLs(WebContents* source);
 
   // Add a message to the console. Returning true indicates that the delegate
   // handled the message. If false is returned the default logging mechanism
   // will be used for the message.
   virtual bool AddMessageToConsole(WebContents* source,
@@ skipping 342 matching lines @@
   // Called when |this| is no longer the WebContentsDelegate for |source|.
   void Detach(WebContents* source);
 
   // The WebContents that this is currently a delegate for.
   std::set<WebContents*> attached_contents_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_DELEGATE_H_