Use a direct include of strings headers in chrome/browser/ui/webui/, part 1.

chrome/browser/ui/webui/instant_ui.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/webui/instant_ui.h"
 
 #include "base/bind.h"
 #include "base/prefs/pref_service.h"
-#include "base/stringprintf.h"
+#include "base/strings/stringprintf.h"
 #include "base/time.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_instant_controller.h"
 #include "chrome/browser/ui/search/instant_controller.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "components/user_prefs/pref_registry_syncable.h"
 #include "content/public/browser/web_ui.h"
@@ skipping 147 matching lines @@
   content::WebUIDataSource::Add(profile, CreateInstantHTMLSource());
 }
 
 // static
 void InstantUI::RegisterUserPrefs(user_prefs::PrefRegistrySyncable* registry) {
   registry->RegisterStringPref(
       prefs::kInstantUIZeroSuggestUrlPrefix,
       std::string(),
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 }