Move Extension into extensions namespace

chrome/browser/sync/glue/chrome_extensions_activity_monitor.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/sync/glue/chrome_extensions_activity_monitor.h"
 
 #include "base/bind.h"
 #include "chrome/browser/bookmarks/bookmark_extension_api.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/extensions/extension.h"
@@ skipping 33 matching lines @@
     records_[i->first].bookmark_write_count += i->second.bookmark_write_count;
   }
 }
 
 void ChromeExtensionsActivityMonitor::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
   base::AutoLock lock(records_lock_);
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  const Extension* extension = content::Source<const Extension>(source).ptr();
+  const extensions::Extension* extension =
+      content::Source<const extensions::Extension>(source).ptr();
   const BookmarksFunction* f =
       content::Details<const BookmarksFunction>(details).ptr();
   if (f->name() == "bookmarks.update" ||
       f->name() == "bookmarks.move" ||
       f->name() == "bookmarks.create" ||
       f->name() == "bookmarks.removeTree" ||
       f->name() == "bookmarks.remove") {
     Record& record = records_[extension->id()];
     record.extension_id = extension->id();
     record.bookmark_write_count++;
   }
 }
 
 }  // namespace browser_sync