Suppress JavaScript dialogs when a tab puts itself into fullscreen.

extensions/browser/app_window/app_window.cc

 // Copyright 2014 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 "extensions/browser/app_window/app_window.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <string>
@@ skipping 899 matching lines @@
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           ::switches::kTestType)) {
     app_window_contents_->DispatchWindowShownForTests();
   }
 }
 
 void AppWindow::CloseContents(WebContents* contents) {
   native_app_window_->Close();
 }
 
-bool AppWindow::ShouldSuppressDialogs(WebContents* source) {
+bool AppWindow::ShouldSuppressDialogs(WebContents* source, bool before_unload) {
   return true;
 }
 
 content::ColorChooser* AppWindow::OpenColorChooser(
     WebContents* web_contents,
     SkColor initial_color,
     const std::vector<content::ColorSuggestion>& suggestions) {
   return app_delegate_->ShowColorChooser(web_contents, initial_color);
 }
 
@@ skipping 195 matching lines @@
         region.bounds.x(),
         region.bounds.y(),
         region.bounds.right(),
         region.bounds.bottom(),
         region.draggable ? SkRegion::kUnion_Op : SkRegion::kDifference_Op);
   }
   return sk_region;
 }
 
 }  // namespace extensions