mac: Always do history swiping on the NTP on lion devices with touchpad.

chrome/browser/ui/browser.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/browser.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <shellapi.h>
 #endif  // OS_WIN
@@ skipping 1475 matching lines @@
 bool Browser::IsClosingPermitted() {
   TabCloseableStateWatcher* watcher =
       g_browser_process->tab_closeable_state_watcher();
   bool can_close = !watcher || watcher->CanCloseBrowser(this);
   if (!can_close && is_attempting_to_close_browser_)
     CancelWindowClose();
   return can_close;
 }
 
 bool Browser::CanGoBack() const {
-  return GetSelectedTabContentsWrapper()->
-      web_contents()->GetController().CanGoBack();
+  return GetSelectedWebContents()->GetController().CanGoBack();
 }
 
 void Browser::GoBack(WindowOpenDisposition disposition) {
   content::RecordAction(UserMetricsAction("Back"));
 
   TabContentsWrapper* current_tab = GetSelectedTabContentsWrapper();
   if (CanGoBack()) {
     WebContents* new_tab = GetOrCloneTabForDisposition(disposition);
     // If we are on an interstitial page and clone the tab, it won't be copied
     // to the new tab, so we don't need to go back.
     if (current_tab->web_contents()->ShowingInterstitialPage() &&
         (new_tab != current_tab->web_contents()))
       return;
     new_tab->GetController().GoBack();
   }
 }
 
 bool Browser::CanGoForward() const {
-  return GetSelectedTabContentsWrapper()->
-      web_contents()->GetController().CanGoForward();
+  return GetSelectedWebContents()->GetController().CanGoForward();
 }
 
 void Browser::GoForward(WindowOpenDisposition disposition) {
   content::RecordAction(UserMetricsAction("Forward"));
   if (CanGoForward())
     GetOrCloneTabForDisposition(disposition)->GetController().GoForward();
 }
 
+bool Browser::IsOnNtp() const {
+  WebContents* contents = GetSelectedWebContents();
+  return contents && contents->GetURL() == GURL(chrome::kChromeUINewTabURL);
+}
+
 void Browser::Reload(WindowOpenDisposition disposition) {
   content::RecordAction(UserMetricsAction("Reload"));
   ReloadInternal(disposition, false);
 }
 
 void Browser::ReloadIgnoringCache(WindowOpenDisposition disposition) {
   content::RecordAction(UserMetricsAction("ReloadIgnoringCache"));
   ReloadInternal(disposition, true);
 }
 
@@ skipping 3964 matching lines @@
     local_state->SetBoolean(prefs::kShouldShowFirstRunBubble, false);
     window_->GetLocationBar()->ShowFirstRunBubble();
   } else {
     GlobalErrorService* service =
         GlobalErrorServiceFactory::GetForProfile(profile());
     GlobalError* error = service->GetFirstGlobalErrorWithBubbleView();
     if (error)
       error->ShowBubbleView(this);
   }
 }