Switch chrome code to use content::WebUI interface instead of WebUI concrete class. The latter will be renamed to WebUIImpl in a followup change. This completes hiding WebUI from chrome code, and now we can block it through DEPS.

BUG=98716
Review URL: https://chromiumcodereview.appspot.com/9241032

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@118038 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/extension_web_ui.h b/chrome/browser/extensions/extension_web_ui.h
index 92052d9b..60eb446 100644
--- a/chrome/browser/extensions/extension_web_ui.h
+++ b/chrome/browser/extensions/extension_web_ui.h
@@ -25,7 +25,7 @@
  public:
   static const char kExtensionURLOverrides[];
 
-  ExtensionWebUI(WebUI* web_ui, const GURL& url);
+  ExtensionWebUI(content::WebUI* web_ui, const GURL& url);
 
   virtual ~ExtensionWebUI();