[UMA] Use proper C++ objects to serialize tracked_objects across process boundaries.

content/public/common/serialized_profiler_data.h

Index: content/public/common/serialized_profiler_data.h
diff --git a/content/public/common/serialized_profiler_data.h b/content/public/common/serialized_profiler_data.h
new file mode 100644
index 0000000000000000000000000000000000000000..d0d61c03d59bdd624a859886f4429a2e405b726f
--- /dev/null
+++ b/content/public/common/serialized_profiler_data.h
@@ -0,0 +1,36 @@
+// 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.
+
+#ifndef CONTENT_PUBLIC_COMMON_SERIALIZED_PROFILER_DATA_H
+#define CONTENT_PUBLIC_COMMON_SERIALIZED_PROFILER_DATA_H
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include "base/tracked_objects.h"
+#include "content/common/content_export.h"
+#include "content/public/common/process_type.h"
+
+namespace base {
+class DictionaryValue;
+}
+
+namespace content {
+
+// Extends SerializedProcessData with the process's type info.
+struct CONTENT_EXPORT SerializedProfilerData :
+    public tracked_objects::SerializedProcessData {
+  SerializedProfilerData();
+  SerializedProfilerData(content::ProcessType process_type);
+  ~SerializedProfilerData();
+
+  void ToValue(base::DictionaryValue* dictionary) const;
+
+  content::ProcessType process_type;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_COMMON_SERIALIZED_PROFILER_DATA_H