Revise about: and chrome: url handling.

chrome/common/about_handler.cc

Index: chrome/common/about_handler.cc
diff --git a/chrome/common/about_handler.cc b/chrome/common/about_handler.cc
index 6e3e152529af46f39bd9ccbd70ec57c2b87c7b0b..e49be4f29a6a821cc9c7960a60bdbdd81c6abe25 100644
--- a/chrome/common/about_handler.cc
+++ b/chrome/common/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.
 
@@ -19,10 +19,8 @@ const char* const about_urls[] = {
 };
 const size_t about_urls_size = arraysize(about_urls);
 
-const char* const kAboutScheme = "about";
-
 bool WillHandle(const GURL& url) {
-  if (url.scheme() != kAboutScheme)
+  if (!url.SchemeIs(chrome::kAboutScheme))
     return false;
 
   const char* const* url_handler = about_urls;