Move Extension into extensions namespace

chrome/browser/extensions/extension_info_map.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/extensions/extension_info_map.h"
 
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_set.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/browser_thread.h"
 
 using content::BrowserThread;
+using extensions::Extension;
 
 namespace {
 
 void CheckOnValidThread() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 }
 
 }  // namespace
 
 struct ExtensionInfoMap::ExtraData {
@@ skipping 124 matching lines @@
     quota_service_.reset(new ExtensionsQuotaService());
   return quota_service_.get();
 }
 
 ExtensionInfoMap::~ExtensionInfoMap() {
   if (quota_service_.get()) {
     BrowserThread::DeleteSoon(BrowserThread::IO, FROM_HERE,
                               quota_service_.release());
   }
 }