Suppress JavaScript dialogs when a tab puts itself into fullscreen.

chrome/browser/ui/fast_unload_controller.cc

 // Copyright 2013 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/ui/fast_unload_controller.h"
 
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 18 matching lines @@
 ////////////////////////////////////////////////////////////////////////////////
 // DetachedWebContentsDelegate will delete web contents when they close.
 class FastUnloadController::DetachedWebContentsDelegate
     : public content::WebContentsDelegate {
  public:
   DetachedWebContentsDelegate() { }
   ~DetachedWebContentsDelegate() override {}
 
  private:
   // WebContentsDelegate implementation.
-  bool ShouldSuppressDialogs(content::WebContents* source) override {
+  bool ShouldSuppressDialogs(content::WebContents* source,
+                             bool before_unload) override {
     return true;  // Return true so dialogs are suppressed.
   }
 
   void CloseContents(content::WebContents* source) override {
     // Finished detached close.
     // FastUnloadController will observe
     // |NOTIFICATION_WEB_CONTENTS_DISCONNECTED|.
     delete source;
   }
 
@@ skipping 422 matching lines @@
   }
 }
 
 void FastUnloadController::PostTaskForProcessPendingTabs() {
   base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE, base::Bind(&FastUnloadController::ProcessPendingTabs,
                             weak_factory_.GetWeakPtr()));
 }
 
 }  // namespace chrome