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

webkit/support/webkit_support.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/support/webkit_support.h"
 
 #include "base/at_exit.h"
 #include "base/base64.h"
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
@@ skipping 246 matching lines @@
   // at same time.
   url_util::Initialize();
   BeforeInitialize(unit_test_mode);
   test_environment = new TestEnvironment(unit_test_mode);
   AfterInitialize(unit_test_mode);
   if (!unit_test_mode) {
     // Load ICU data tables.  This has to run after TestEnvironment is created
     // because on Linux, we need base::AtExitManager.
     icu_util::Initialize();
   }
-  webkit_glue::SetUserAgent("DumpRenderTree", false);
 }
 
 void SetUpTestEnvironment() {
   SetUpTestEnvironmentImpl(false);
 }
 
 void SetUpTestEnvironmentForUnitTests() {
   SetUpTestEnvironmentImpl(true);
 }
 
@@ skipping 357 matching lines @@
   return ui::GdkNativeKeyCodeForWindowsKeyCode(code, shift);
 }
 #endif
 
 // Timers
 double GetForegroundTabTimerInterval() {
   return webkit_glue::kForegroundTabTimerInterval;
 }
 
 }  // namespace webkit_support