Suppress JavaScript dialogs when a tab puts itself into fullscreen.

chrome/browser/prerender/prerender_manager.cc

 // 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.
 
 #include "chrome/browser/prerender/prerender_manager.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <functional>
@@ skipping 90 matching lines @@
         base::Bind(&OnCloseWebContentsDeleter::ScheduleWebContentsForDeletion,
                    AsWeakPtr(), true),
         base::TimeDelta::FromSeconds(kDeleteWithExtremePrejudiceSeconds));
   }
 
   void CloseContents(WebContents* source) override {
     DCHECK_EQ(tab_.get(), source);
     ScheduleWebContentsForDeletion(false);
   }
 
-  bool ShouldSuppressDialogs(WebContents* source) override {
+  bool ShouldSuppressDialogs(WebContents* source, bool before_unload) override {
     // Use this as a proxy for getting statistics on how often we fail to honor
     // the beforeunload event.
     DCHECK_EQ(tab_.get(), source);
     suppressed_dialog_ = true;
     return true;
   }
 
  private:
   static const int kDeleteWithExtremePrejudiceSeconds = 3;
 
@@ skipping 1161 matching lines @@
   DCHECK_EQ(1u, erased);
 }
 
 void PrerenderManager::SetPrerenderContentsFactoryForTest(
     PrerenderContents::Factory* prerender_contents_factory) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   prerender_contents_factory_.reset(prerender_contents_factory);
 }
 
 }  // namespace prerender