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

chrome/browser/task_profiler/task_profiler_data_serializer.h

Index: chrome/browser/task_profiler/task_profiler_data_serializer.h
diff --git a/chrome/browser/task_profiler/task_profiler_data_serializer.h b/chrome/browser/task_profiler/task_profiler_data_serializer.h
index 8ada67038be2113cdd1de9813670748ebcf41559..1bd5e3cf23b30703c2a08c700d61f46649bde117 100644
--- a/chrome/browser/task_profiler/task_profiler_data_serializer.h
+++ b/chrome/browser/task_profiler/task_profiler_data_serializer.h
@@ -6,15 +6,37 @@
 #define CHROME_BROWSER_TASK_PROFILER_TASK_PROFILER_DATA_SERIALIZER_H_
 #pragma once
 
+#include "base/basictypes.h"
+#include "content/public/common/process_type.h"
+
 class FilePath;
 
+namespace base {
+class DictionaryValue;
+}
+
+namespace tracked_objects {
+struct SerializedProcessData;
+}
+
 namespace task_profiler {
 
 // This class collects task profiler data and serializes it to a file.  The file
 // format is compatible with the about:profiler UI.
 class TaskProfilerDataSerializer {
  public:
-  bool WriteToFile(const FilePath &path);
+  TaskProfilerDataSerializer() {}
+
+  // Re-serializes |process_data| and |process_type| into |dictionary|.
+  static void SerializeToJson(
+      const tracked_objects::SerializedProcessData& process_data,
+      content::ProcessType process_type,
+      base::DictionaryValue* dictionary);
+
+  bool WriteToFile(const FilePath& path);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(TaskProfilerDataSerializer);
 };
 
 }  // namespace task_profiler