Use Chrome's user agent string for content_shell, since some sites (i.e. Gmail) give a degraded e...

content/shell/shell_content_client.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 "content/shell/shell_content_client.h"
 
 #include "base/string_piece.h"
+#include "webkit/glue/user_agent.h"
 
 namespace content {
 
 ShellContentClient::~ShellContentClient() {
 }
 
 void ShellContentClient::SetActiveURL(const GURL& url) {
 }
 
 void ShellContentClient::SetGpuInfo(const GPUInfo& gpu_info) {
 }
 
 void ShellContentClient::AddPepperPlugins(
     std::vector<PepperPluginInfo>* plugins) {
 }
 
 bool ShellContentClient::CanSendWhileSwappedOut(const IPC::Message* msg) {
   return false;
 }
 
 bool ShellContentClient::CanHandleWhileSwappedOut(const IPC::Message& msg) {
   return false;
 }
 
 std::string ShellContentClient::GetUserAgent(bool mimic_windows) const {
-  return std::string();
+  return webkit_glue::BuildUserAgentHelper(mimic_windows, "Chrome/15.16.17.18");
 }
 
 string16 ShellContentClient::GetLocalizedString(int message_id) const {
   return string16();
 }
 
 base::StringPiece ShellContentClient::GetDataResource(int resource_id) const {
   return base::StringPiece();
 }
 
 #if defined(OS_WIN)
 bool ShellContentClient::SandboxPlugin(CommandLine* command_line,
                                        sandbox::TargetPolicy* policy) {
   return false;
 }
 #endif
 
 }  // namespace content