Move Extension into extensions namespace

chrome/browser/ui/cocoa/infobars/extension_infobar_controller.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/infobars/extension_infobar_controller.h"
 
 #include <cmath>
 
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_infobar_delegate.h"
@@ skipping 51 matching lines @@
     LoadIcon();
   }
 
   virtual ~InfobarBridge() {
     if (delegate_)
       delegate_->set_observer(NULL);
   }
 
   // Load the Extension's icon image.
   void LoadIcon() {
-    const Extension* extension = delegate_->extension_host()->extension();
+    const extensions::Extension* extension = delegate_->extension_host()->
+        extension();
     ExtensionResource icon_resource =
         extension->GetIconResource(ExtensionIconSet::EXTENSION_ICON_BITTY,
                                    ExtensionIconSet::MATCH_EXACTLY);
     tracker_.LoadImage(extension, icon_resource,
                        gfx::Size(ExtensionIconSet::EXTENSION_ICON_BITTY,
                                  ExtensionIconSet::EXTENSION_ICON_BITTY),
                        ImageLoadingTracker::DONT_CACHE);
   }
 
   // ImageLoadingTracker::Observer implementation.
@@ skipping 185 matching lines @@
 
 InfoBar* ExtensionInfoBarDelegate::CreateInfoBar(InfoBarTabHelper* owner) {
   NSWindow* window =
       [(NSView*)owner->web_contents()->GetContentNativeView() window];
   ExtensionInfoBarController* controller =
       [[ExtensionInfoBarController alloc] initWithDelegate:this
                                                      owner:owner
                                                     window:window];
   return new InfoBar(controller, this);
 }