Revise about: and chrome: url handling.

chrome/renderer/about_handler.cc

Index: chrome/renderer/about_handler.cc
diff --git a/chrome/renderer/about_handler.cc b/chrome/renderer/about_handler.cc
index e748aa13a38dc98e2bc3ed5337727b248897d4d5..6c8d664b1bab460b67eaf6a23610b6578be41ec3 100644
--- a/chrome/renderer/about_handler.cc
+++ b/chrome/renderer/about_handler.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
@@ -7,6 +7,7 @@
 #include "base/process_util.h"
 #include "base/threading/platform_thread.h"
 #include "chrome/common/about_handler.h"
+#include "content/common/url_constants.h"
 #include "googleurl/src/gurl.h"
 
 typedef void (*AboutHandlerFuncPtr)();
@@ -23,7 +24,7 @@ static const AboutHandlerFuncPtr about_urls_handlers[] = {
 
 // static
 bool AboutHandler::MaybeHandle(const GURL& url) {
-  if (url.scheme() != chrome_about_handler::kAboutScheme)
+  if (!url.SchemeIs(chrome::kAboutScheme))
     return false;
 
   int about_urls_handler_index = 0;