Update a bunch of files to the new location of browser_thread.h

chrome/browser/content_settings/host_content_settings_map.h

 // Copyright (c) 2011 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.
 
 // Maps hostnames to custom content settings.  Written on the UI thread and read
 // on any thread.  One instance per profile.
 
 #ifndef CHROME_BROWSER_CONTENT_SETTINGS_HOST_CONTENT_SETTINGS_MAP_H_
 #define CHROME_BROWSER_CONTENT_SETTINGS_HOST_CONTENT_SETTINGS_MAP_H_
 #pragma once
 
 #include <map>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/linked_ptr.h"
 #include "base/ref_counted.h"
 #include "base/synchronization/lock.h"
-#include "chrome/browser/browser_thread.h"
 #include "chrome/browser/content_settings/content_settings_pattern.h"
 #include "chrome/browser/prefs/pref_change_registrar.h"
 #include "chrome/common/content_settings.h"
 #include "chrome/common/notification_observer.h"
 #include "chrome/common/notification_registrar.h"
+#include "content/browser/browser_thread.h"
 
 namespace content_settings {
 class DefaultProviderInterface;
 class ProviderInterface;
 }  // namespace content_settings
 
 class ContentSettingsDetails;
 class DictionaryValue;
 class GURL;
 class PrefService;
@@ skipping 174 matching lines @@
 
   // Misc global settings.
   bool block_third_party_cookies_;
   bool is_block_third_party_cookies_managed_;
   bool block_nonsandboxed_plugins_;
 
   DISALLOW_COPY_AND_ASSIGN(HostContentSettingsMap);
 };
 
 #endif  // CHROME_BROWSER_CONTENT_SETTINGS_HOST_CONTENT_SETTINGS_MAP_H_