Close web contents modal dialogs on content load start

chrome/browser/ui/tab_modal_confirm_dialog_delegate.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/ui/tab_modal_confirm_dialog_delegate.h"
 
 #include "chrome/common/chrome_notification_types.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/notification_source.h"
 #include "content/public/browser/web_contents.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
 using content::NavigationController;
 using content::WebContents;
 
 TabModalConfirmDialogDelegate::TabModalConfirmDialogDelegate(
     WebContents* web_contents)
     : close_delegate_(NULL),
       closing_(false) {
   NavigationController* controller = &web_contents->GetController();
-  registrar_.Add(this, content::NOTIFICATION_LOAD_START,
-                 content::Source<NavigationController>(controller));
   registrar_.Add(this, chrome::NOTIFICATION_TAB_CLOSING,
                  content::Source<NavigationController>(controller));
 }
 
 TabModalConfirmDialogDelegate::~TabModalConfirmDialogDelegate() {
   // If we end up here, the window has been closed, so make sure we don't close
   // it again.
   close_delegate_ = NULL;
   // Make sure everything is cleaned up.
   Cancel();
@@ skipping 17 matching lines @@
   closing_ = true;
   OnAccepted();
   CloseDialog();
 }
 
 
 void TabModalConfirmDialogDelegate::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
-  // Close the dialog if we load a page (because the action might not apply to
-  // the same page anymore) or if the tab is closed.
-  if (type == content::NOTIFICATION_LOAD_START ||
-      type == chrome::NOTIFICATION_TAB_CLOSING) {
+  // Close the dialog if the tab is closed.
+  if (type == chrome::NOTIFICATION_TAB_CLOSING) {
     Cancel();
   } else {
     NOTREACHED();
   }
 }
 
 gfx::Image* TabModalConfirmDialogDelegate::GetIcon() {
   return NULL;
 }
 
@@ skipping 16 matching lines @@
 void TabModalConfirmDialogDelegate::OnAccepted() {
 }
 
 void TabModalConfirmDialogDelegate::OnCanceled() {
 }
 
 void TabModalConfirmDialogDelegate::CloseDialog() {
   if (close_delegate_)
     close_delegate_->CloseDialog();
 }