Move Extension into extensions namespace

chrome/browser/extensions/external_extension_provider_interface.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTERNAL_EXTENSION_PROVIDER_INTERFACE_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTERNAL_EXTENSION_PROVIDER_INTERFACE_H_
 #pragma once
 
 #include <vector>
 
@@ skipping 14 matching lines @@
   // ensure that |id| is a valid extension id (use Extension::IdIsValid(id)).
   class VisitorInterface {
    public:
     // Return true if the extension install will proceed.  Install will not
     // proceed if the extension is already installed from a higher priority
     // location.
     virtual bool OnExternalExtensionFileFound(
         const std::string& id,
         const Version* version,
         const FilePath& path,
-        Extension::Location location,
+        extensions::Extension::Location location,
         int creation_flags,
         bool mark_acknowledged) = 0;
 
     // Return true if the extension install will proceed.  Install might not
     // proceed if the extension is already installed from a higher priority
     // location.
     virtual bool OnExternalExtensionUpdateUrlFound(
         const std::string& id,
         const GURL& update_url,
-        Extension::Location location) = 0;
+        extensions::Extension::Location location) = 0;
 
     // Called after all the external extensions have been reported
     // through the above two methods. |provider| is a pointer to the
     // provider that is now ready (typically this), and the
     // implementation of OnExternalProviderReady() should be able to
     // safely assert that provider->IsReady().
     virtual void OnExternalProviderReady(
       const ExternalExtensionProviderInterface* provider) = 0;
 
    protected:
@@ skipping 11 matching lines @@
   virtual void VisitRegisteredExtension() = 0;
 
   // Test if this provider has an extension with id |id| registered.
   virtual bool HasExtension(const std::string& id) const = 0;
 
   // Gets details of an extension by its id.  Output params will be set only
   // if they are not NULL.  If an output parameter is not specified by the
   // provider type, it will not be changed.
   // This function is no longer used outside unit tests.
   virtual bool GetExtensionDetails(const std::string& id,
-                                   Extension::Location* location,
+                                   extensions::Extension::Location* location,
                                    scoped_ptr<Version>* version) const = 0;
 
   // Determines if this provider had loaded the list of external extensions
   // from its source.
   virtual bool IsReady() const = 0;
 };
 
 typedef std::vector<linked_ptr<ExternalExtensionProviderInterface> >
     ProviderCollection;
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTERNAL_EXTENSION_PROVIDER_INTERFACE_H_