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

chrome/browser/content_settings/content_settings_policy_provider.cc

 // Copyright (c) 2010 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/content_settings/content_settings_policy_provider.h"
 
 #include <string>
 #include <vector>
 
 #include "base/command_line.h"
-#include "chrome/browser/browser_thread.h"
 #include "chrome/browser/content_settings/content_settings_details.h"
 #include "chrome/browser/content_settings/content_settings_pattern.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/prefs/scoped_pref_update.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/notification_details.h"
 #include "chrome/common/notification_service.h"
 #include "chrome/common/notification_source.h"
 #include "chrome/common/pref_names.h"
-
+#include "content/browser/browser_thread.h"
 #include "webkit/plugins/npapi/plugin_group.h"
 #include "webkit/plugins/npapi/plugin_list.h"
 
 namespace {
 
 // Base pref path of the prefs that contain the managed default content
 // settings values.
 const std::string kManagedSettings =
       "profile.managed_default_content_settings";
 
@@ skipping 442 matching lines @@
     }
   } else if (type == NotificationType::PROFILE_DESTROYED) {
     DCHECK_EQ(profile_, Source<Profile>(source).ptr());
     UnregisterObservers();
   } else {
     NOTREACHED() << "Unexpected notification";
   }
 }
 
 }  // namespace content_settings