Move user_agent code from webkit/ to content/.

chrome/browser/task_profiler/task_profiler_data_serializer.cc

 // Copyright (c) 2012 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 "chrome/browser/task_profiler/task_profiler_data_serializer.h"
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/time/time.h"
 #include "base/tracked_objects.h"
-#include "content/public/common/content_client.h"
 #include "content/public/common/process_type.h"
+#include "content/public/common/user_agent.h"
 #include "url/gurl.h"
 
 using base::DictionaryValue;
 using base::ListValue;
 using base::Value;
 using tracked_objects::BirthOnThreadSnapshot;
 using tracked_objects::DeathDataSnapshot;
 using tracked_objects::LocationSnapshot;
 using tracked_objects::ParentChildPairSnapshot;
 using tracked_objects::TaskSnapshot;
@@ skipping 137 matching lines @@
   snapshot_list->Append(shutdown_snapshot);
   root->Set("snapshots", snapshot_list);
 
   serializer.Serialize(*root);
   int data_size = static_cast<int>(output.size());
 
   return data_size == file_util::WriteFile(path, output.data(), data_size);
 }
 
 }  // namespace task_profiler