Move c/b/extension/api/* into extensions namespace

chrome/browser/extensions/api/terminal/terminal_extension_helper.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/api/terminal/terminal_extension_helper.h"
 
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/extensions/extension.h"
 
@@ skipping 19 matching lines @@
         kPossibleAppIds[x], false);
     if (extension)
       return extension;
   }
 
   return NULL;
 }
 
 }  // namespace
 
+namespace extensions {
+
 GURL TerminalExtensionHelper::GetCroshExtensionURL(Profile* profile) {
   const extensions::Extension* extension = GetTerminalExtension(profile);
   if (!extension)
     return GURL();
 
   return extension->GetResourceURL(kCroshExtensionEntryPoint);
 }
+
+}  // namespace extensions