Rename WebUI to WebUIImpl.

BUG=98716
Review URL: https://chromiumcodereview.appspot.com/9150021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@118337 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/content/browser/tab_contents/tab_contents.h b/content/browser/tab_contents/tab_contents.h
index 65519d6..058e650 100644
--- a/content/browser/tab_contents/tab_contents.h
+++ b/content/browser/tab_contents/tab_contents.h
@@ -326,7 +326,7 @@
   virtual void UpdateRenderViewSizeForRenderManager() OVERRIDE;
   virtual void NotifySwappedFromRenderManager() OVERRIDE;
   virtual NavigationControllerImpl& GetControllerForRenderManager() OVERRIDE;
-  virtual WebUI* CreateWebUIForRenderManager(const GURL& url) OVERRIDE;
+  virtual WebUIImpl* CreateWebUIForRenderManager(const GURL& url) OVERRIDE;
   virtual content::NavigationEntry*
       GetLastCommittedNavigationEntryForRenderManager() OVERRIDE;
   virtual bool FocusLocationBarByDefault() OVERRIDE;