Move ChromeExtensionHostMsg_AttachGuest to extensions.

extensions/browser/extension_message_filter.h

 // Copyright 2014 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.
 
 #ifndef EXTENSIONS_BROWSER_EXTENSION_MESSAGE_FILTER_H_
 #define EXTENSIONS_BROWSER_EXTENSION_MESSAGE_FILTER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 42 matching lines @@
 
   // Message handlers on the UI thread.
   void OnExtensionAddListener(const std::string& extension_id,
                               const GURL& listener_url,
                               const std::string& event_name);
   void OnExtensionRemoveListener(const std::string& extension_id,
                                  const GURL& listener_url,
                                  const std::string& event_name);
   void OnExtensionAddLazyListener(const std::string& extension_id,
                                   const std::string& event_name);
+  void OnExtensionAttachGuest(int routing_id,
+                              int element_instance_id,
+                              int guest_instance_id,
+                              const base::DictionaryValue& attach_params);
   void OnExtensionRemoveLazyListener(const std::string& extension_id,
                                      const std::string& event_name);
   void OnExtensionAddFilteredListener(const std::string& extension_id,
                                       const std::string& event_name,
                                       const base::DictionaryValue& filter,
                                       bool lazy);
   void OnExtensionRemoveFilteredListener(const std::string& extension_id,
                                          const std::string& event_name,
                                          const base::DictionaryValue& filter,
                                          bool lazy);
@@ skipping 18 matching lines @@
 
   // Weak pointers produced by this factory are bound to the IO thread.
   base::WeakPtrFactory<ExtensionMessageFilter> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionMessageFilter);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_EXTENSION_MESSAGE_FILTER_H_