Reload Local NTP on default search provider change.

chrome/browser/ui/search/instant_page.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/search/instant_page.h"
 
 #include "apps/app_launcher.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/search/search.h"
 #include "chrome/browser/ui/search/instant_ntp.h"
@@ skipping 21 matching lines @@
   return contents() ?
       SearchTabHelper::FromWebContents(contents())->SupportsInstant() : false;
 }
 
 const std::string& InstantPage::instant_url() const {
   return instant_url_;
 }
 
 bool InstantPage::IsLocal() const {
   return contents() &&
-      (contents()->GetURL() == GURL(chrome::kChromeSearchLocalNtpUrl) ||
-       contents()->GetURL() == GURL(chrome::kChromeSearchLocalGoogleNtpUrl));
+      contents()->GetURL() == GURL(chrome::kChromeSearchLocalNtpUrl);
 }
 
 void InstantPage::InitializeFonts() {
 #if defined(OS_MACOSX)
   // This value should be kept in sync with OmniboxViewMac::GetFieldFont.
   const gfx::Font& omnibox_font =
       ui::ResourceBundle::GetSharedInstance().GetFont(
           ui::ResourceBundle::MediumFont).DeriveFont(1);
 #else
   const gfx::Font& omnibox_font =
@@ skipping 189 matching lines @@
   delegate_->UndoAllMostVisitedDeletions();
 }
 
 void InstantPage::ClearContents() {
   if (contents())
     SearchTabHelper::FromWebContents(contents())->model()->RemoveObserver(this);
 
   sender()->SetContents(NULL);
   Observe(NULL);
 }