Update defaults for InstantExtended.

chrome/browser/ui/search/instant_ntp_prerenderer.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_ntp_prerenderer.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/prefs/pref_service.h"
@@ skipping 56 matching lines @@
 
 InstantNTPPrerenderer::~InstantNTPPrerenderer() {
   InstantService* instant_service =
       InstantServiceFactory::GetForProfile(profile_);
   if (instant_service)
     instant_service->RemoveObserver(this);
   net::NetworkChangeNotifier::RemoveNetworkChangeObserver(this);
 }
 
 void InstantNTPPrerenderer::ReloadInstantNTP() {
+  // Stub for unit tests.

[Jered, 2013/10/01 20:57:34]

This method isn't tested?

[samarth, 2013/10/02 00:18:00]

No, this is necessary because of a random extension-related unit test that
forces the test to run on IO loop.  But if you try to  load a page on that, it
hits a DCHECK somewhere else down the line.  Clarified the comment some more but
if you have suggestions for better work arounds I'm all ears.  The test in
question is ExtensionContextMenuModelTest.PolicyDisablesItems.

+  if (base::MessageLoop::current()->type() != base::MessageLoop::TYPE_UI)
+    return;
+
   ResetNTP(GetInstantURL());
 }
 
 scoped_ptr<content::WebContents> InstantNTPPrerenderer::ReleaseNTPContents() {
   if (!profile_ || profile_->IsOffTheRecord() ||
       !chrome::ShouldShowInstantNTP())
     return scoped_ptr<content::WebContents>();
 
   if (ShouldSwitchToLocalNTP())
     ResetNTP(GetLocalInstantURL());
@@ skipping 203 matching lines @@
   return !(InStartup() && chrome::ShouldPreferRemoteNTPOnStartup());
 }
 
 void InstantNTPPrerenderer::DefaultSearchProviderChanged() {
   ReloadInstantNTP();
 }
 
 void InstantNTPPrerenderer::GoogleURLUpdated() {
   ReloadInstantNTP();
 }