Move ExtensionHost into extensions namespace

chrome/browser/automation/automation_provider_observers.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/automation/automation_provider_observers.h"
 
 #include <deque>
 #include <string>
 #include <vector>
 
@@ skipping 3058 matching lines @@
 
 void ExtensionPopupObserver::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
   if (!automation_) {
     delete this;
     return;
   }
 
-  ExtensionHost* host = content::Details<ExtensionHost>(details).ptr();
+  extensions::ExtensionHost* host =
+      content::Details<extensions::ExtensionHost>(details).ptr();
   if (host->extension_id() == extension_id_ &&
       host->extension_host_type() == chrome::VIEW_TYPE_EXTENSION_POPUP) {
     AutomationJSONReply(automation_, reply_message_.release())
         .SendSuccess(NULL);
     delete this;
   }
 }
 
 #if defined(OS_LINUX)
 WindowMaximizedObserver::WindowMaximizedObserver(
@@ skipping 64 matching lines @@
       if (automation_) {
         AutomationJSONReply(automation_, reply_message_.release())
             .SendSuccess(NULL);
       }
       delete this;
     }
   } else {
     NOTREACHED();
   }
 }