Initialize StatisticsRecorder in Child Process to hold

base/metrics/statistics_recorder.h

Index: base/metrics/statistics_recorder.h
===================================================================
--- base/metrics/statistics_recorder.h	(revision 147155)
+++ base/metrics/statistics_recorder.h	(working copy)
@@ -31,6 +31,9 @@
 
   ~StatisticsRecorder();
 
+  // Initializes the StatisticsRecorder system.
+  static void Initialize();
+
   // Find out if histograms can now be registered into our list.
   static bool IsActive();
 
@@ -77,7 +80,6 @@
   // pointer to be copied.
   static void GetSnapshot(const std::string& query, Histograms* snapshot);
 
-
  private:
   // We keep all registered histograms in a map, from name to histogram.
   typedef std::map<std::string, Histogram*> HistogramMap;