Stops javascript alerts and unload dialogs from showing during

chrome/browser/tab_contents/tab_contents_delegate.cc

 // Copyright (c) 2010 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/tab_contents/tab_contents_delegate.h"
 
 #include "chrome/browser/search_engines/template_url.h"
 #include "gfx/rect.h"
 
 void TabContentsDelegate::DetachContents(TabContents* source) {
@@ skipping 27 matching lines @@
 void TabContentsDelegate::ConvertContentsToApplication(TabContents* source) { }
 
 bool TabContentsDelegate::CanReloadContents(TabContents* source) const {
   return true;
 }
 
 void TabContentsDelegate::ShowHtmlDialog(HtmlDialogUIDelegate* delegate,
                                          gfx::NativeWindow parent_window) {
 }
 
+bool TabContentsDelegate::ShouldSuppressDialogs() {
+  return false;
+}
+
 void TabContentsDelegate::BeforeUnloadFired(TabContents* tab,
                                             bool proceed,
                                             bool* proceed_to_fire_unload) {
   *proceed_to_fire_unload = true;
 }
 
 void TabContentsDelegate::ForwardMessageToExternalHost(
     const std::string& message,
     const std::string& origin,
     const std::string& target) {
@@ skipping 135 matching lines @@
 
 void TabContentsDelegate::OnInstantSupportDetermined(int32 page_id,
                                                      bool result) {
 }
 
 void TabContentsDelegate::ContentRestrictionsChanged(TabContents* source) {
 }
 
 TabContentsDelegate::~TabContentsDelegate() {
 }