Move Extension into extensions namespace

chrome/browser/ui/extensions/shell_window.h

Index: chrome/browser/ui/extensions/shell_window.h
diff --git a/chrome/browser/ui/extensions/shell_window.h b/chrome/browser/ui/extensions/shell_window.h
index dec4dd82715e5dd53c26a4dd252db4d839d25537..b259629a249bb5b293d7cf7cfe8c8ba209f5f742 100644
--- a/chrome/browser/ui/extensions/shell_window.h
+++ b/chrome/browser/ui/extensions/shell_window.h
@@ -15,7 +15,6 @@
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/browser/web_contents_observer.h"
 
-class Extension;
 class ExtensionWindowController;
 class GURL;
 class Profile;
@@ -24,6 +23,10 @@ namespace content {
 class WebContents;
 }
 
+namespace extensions {
+class Extension;
+}
+
 // ShellWindow is the type of window used by platform apps. Shell windows
 // have a WebContents but none of the chrome of normal browser windows.
 class ShellWindow : public content::NotificationObserver,
@@ -33,7 +36,7 @@ class ShellWindow : public content::NotificationObserver,
                     public BaseWindow {
  public:
   static ShellWindow* Create(Profile* profile,
-                             const Extension* extension,
+                             const extensions::Extension* extension,
                              const GURL& url);
 
   const SessionID& session_id() const { return session_id_; }
@@ -48,11 +51,11 @@ class ShellWindow : public content::NotificationObserver,
   static const int kDefaultHeight = 384;
 
   ShellWindow(Profile* profile,
-              const Extension* extension,
+              const extensions::Extension* extension,
               const GURL& url);
   virtual ~ShellWindow();
 
-  const Extension* extension() const { return extension_; }
+  const extensions::Extension* extension() const { return extension_; }
   content::WebContents* web_contents() const { return web_contents_.get(); }
 
  private:
@@ -62,7 +65,7 @@ class ShellWindow : public content::NotificationObserver,
   // Instantiates a platform-specific ShellWindow subclass (one implementation
   // per platform). Public users of ShellWindow should use ShellWindow::Create.
   static ShellWindow* CreateImpl(Profile* profile,
-                                 const Extension* extension,
+                                 const extensions::Extension* extension,
                                  const GURL& url);
 
   // content::WebContentsObserver
@@ -84,7 +87,8 @@ class ShellWindow : public content::NotificationObserver,
   void OnRequest(const ExtensionHostMsg_Request_Params& params);
 
   Profile* profile_;  // weak pointer - owned by ProfileManager.
-  const Extension* extension_;  // weak pointer - owned by ExtensionService.
+  // weak pointer - owned by ExtensionService.
+  const extensions::Extension* extension_;
 
   const SessionID session_id_;
   scoped_ptr<content::WebContents> web_contents_;