Use the DefaultSearchManager as the exclusive authority on DSE, ignoring Web Data.

chrome/browser/search/instant_unittest_base.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/search/instant_unittest_base.h"
 #include <string>
 
 #include "base/basictypes.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/google/google_url_tracker.h"
@@ skipping 69 matching lines @@
       chrome::NOTIFICATION_GOOGLE_URL_UPDATED,
       content::Source<Profile>(profile()->GetOriginalProfile()),
       content::Details<GoogleURLTracker::UpdatedDetails>(&details));
 }
 
 bool InstantUnitTestBase::IsInstantServiceObserver(
     InstantServiceObserver* observer) {
   return instant_service_->observers_.HasObserver(observer);
 }
 
+void InstantUnitTestBase::CustomizeServiceFactories() {
+  TemplateURLServiceFactory::GetInstance()->SetTestingFactoryAndUse(
+      profile(), &TemplateURLServiceFactory::BuildInstanceFor);
+}
+
 void InstantUnitTestBase::SetUpHelper() {
   BrowserWithTestWindowTest::SetUp();
 
-  TemplateURLServiceFactory::GetInstance()->SetTestingFactoryAndUse(
-      profile(), &TemplateURLServiceFactory::BuildInstanceFor);
   template_url_service_ = TemplateURLServiceFactory::GetForProfile(profile());
   ui_test_utils::WaitForTemplateURLServiceToLoad(template_url_service_);
 
   UIThreadSearchTermsData::SetGoogleBaseURL("https://www.google.com/");
   TestingPrefServiceSyncable* pref_service = profile()->GetTestingPrefService();
   pref_service->SetUserPref(prefs::kLastPromptedGoogleURL,
                             new base::StringValue("https://www.google.com/"));
   SetUserSelectedDefaultSearchProvider("{google:baseURL}");
   instant_service_ = InstantServiceFactory::GetForProfile(profile());
 }