Revert "Remove webkit_glue::BuildUserAgent(), change the contract in webkit_glue"

webkit/support/webkit_support_glue.cc

 // 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.
 
 #include "webkit/glue/webkit_glue.h"
 
 #include "base/base_paths.h"
 #include "base/path_service.h"
 #include "googleurl/src/gurl.h"
 #include "webkit/glue/user_agent.h"
@@ skipping 30 matching lines @@
 
 bool IsProtocolSupportedForMedia(const GURL& url) {
   if (url.SchemeIsFile() ||
       url.SchemeIs("http") ||
       url.SchemeIs("https") ||
       url.SchemeIs("data"))
     return true;
   return false;
 }
 
+std::string BuildUserAgent(bool mimic_windows) {
+  return webkit_glue::BuildUserAgentHelper(mimic_windows,
+                                           "DumpRenderTree/0.0.0.0");
+}
+
 bool GetPluginFinderURL(std::string* plugin_finder_url) {
   return false;
 }
 
 #if defined(OS_WIN)
 bool DownloadUrl(const std::string& url, HWND caller_window) {
   return false;
 }
 #endif
 
 void EnableSpdy(bool enable) {
 }
 
 void UserMetricsRecordAction(const std::string& action) {
 }
 
 #if defined(OS_LINUX)
 int MatchFontWithFallback(const std::string& face, bool bold,
                           bool italic, int charset) {
   return -1;
 }
 
 bool GetFontTable(int fd, uint32_t table, uint8_t* output,
                   size_t* output_length) {
   return false;
 }
 #endif
 
 }  // namespace webkit_glue