Move ExtensionHost into extensions namespace

chrome/browser/file_select_helper.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_FILE_SELECT_HELPER_H_
 #define CHROME_BROWSER_FILE_SELECT_HELPER_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 10 matching lines @@
 class RenderViewHost;
 class WebContents;
 struct FileChooserParams;
 }
 
 namespace ui {
 struct SelectedFileInfo;
 }
 
 // This class handles file-selection requests coming from WebUI elements
-// (via the ExtensionHost class). It implements both the initialisation
-// and listener functions for file-selection dialogs.
+// (via the extensions::ExtensionHost class). It implements both the
+// initialisation and listener functions for file-selection dialogs.
 class FileSelectHelper
     : public base::RefCountedThreadSafe<FileSelectHelper>,
       public ui::SelectFileDialog::Listener,
       public content::NotificationObserver {
  public:
 
   // Show the file chooser dialog.
   static void RunFileChooser(content::WebContents* tab,
                              const content::FileChooserParams& params);
 
@@ skipping 115 matching lines @@
   struct ActiveDirectoryEnumeration;
   std::map<int, ActiveDirectoryEnumeration*> directory_enumerations_;
 
   // Registrar for notifications regarding our RenderViewHost.
   content::NotificationRegistrar notification_registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(FileSelectHelper);
 };
 
 #endif  // CHROME_BROWSER_FILE_SELECT_HELPER_H_