Consolidate scheme checks into an easy GURL method

net/http/http_util_icu.cc

 // Copyright (c) 2009 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.
 
 // The rules for parsing content-types were borrowed from Firefox:
 // http://lxr.mozilla.org/mozilla/source/netwerk/base/src/nsURLHelper.cpp#834
 
 #include "net/http/http_util.h"
 
 #include "base/logging.h"
 #include "net/base/net_util.h"
 
 namespace net {
 
 // static
 std::string HttpUtil::PathForRequest(const GURL& url) {
-  DCHECK(url.is_valid() && (url.SchemeIs("http") || url.SchemeIs("https")));
+  DCHECK(url.is_valid() && url.SchemeIsHTTPOrHTTPS());
   if (url.has_query())
     return url.path() + "?" + url.query();
   return url.path();
 }
 
 // static
 std::string HttpUtil::SpecForRequest(const GURL& url) {
   // We may get ftp scheme when fetching ftp resources through proxy.
-  DCHECK(url.is_valid() && (url.SchemeIs("http") ||
-                            url.SchemeIs("https") ||
+  DCHECK(url.is_valid() && (url.SchemeIsHTTPOrHTTPS() ||
                             url.SchemeIs("ftp")));
   return SimplifyUrlForRequest(url).spec();
 }
 
 }  // namespace net