Revise about: and chrome: url handling.

chrome/browser/ui/webui/web_ui_util.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_WEB_UI_UTIL_H_
 #define CHROME_BROWSER_UI_WEBUI_WEB_UI_UTIL_H_
 #pragma once
 
 #include <string>
 
-class GURL;
 class SkBitmap;
 
 namespace web_ui_util {
 
 // Convenience routine to convert SkBitmap object to data url
 // so that it can be used in WebUI.
 std::string GetImageDataUrl(const SkBitmap& bitmap);
 
 // Convenience routine to get data url that corresponds to given
 // resource_id as an image. This function does not check if the
 // resource for the |resource_id| is an image, therefore it is the
 // caller's responsibility to make sure the resource is indeed an
 // image. Returns empty string if a resource does not exist for given
 // |resource_id|.
 std::string GetImageDataUrlFromResource(int resource_id);
 
-// Returns true if |url| has a chrome: or about: scheme and matching |host|.
-// The url may contain a path under the host.
-bool ChromeURLHostEquals(const GURL& url, const char* host);
-
 }  // namespace web_ui_util
 
 #endif  // CHROME_BROWSER_UI_WEBUI_WEB_UI_UTIL_H_