...

chrome/common/metrics_helpers.h

Index: chrome/common/metrics_helpers.h
===================================================================
--- chrome/common/metrics_helpers.h	(revision 49384)
+++ chrome/common/metrics_helpers.h	(working copy)
@@ -77,6 +77,10 @@
 
   int num_events() { return num_events_; }
 
+  void set_hardware_class(const std::string& hardware_class) {
+    hardware_class_ = hardware_class;
+  }
+
   // Creates an MD5 hash of the given value, and returns hash as a byte
   // buffer encoded as a std::string.
   static std::string CreateHash(const std::string& value);
@@ -131,6 +135,11 @@
 
   static const char* WindowEventTypeToString(WindowEventType type);
 
+  // Frees the resources allocated by the XML document writer: the
+  // main writer object as well as the XML tree structure, if
+  // applicable.
+  void FreeDocWriter();
+
   // Convenience versions of xmlWriter functions
   void StartElement(const char* name);
   void EndElement();
@@ -149,12 +158,14 @@
 
   std::string client_id_;
   std::string session_id_;
+  std::string hardware_class_;
 
   // locked_ is true when record has been packed up for sending, and should
   // no longer be written to.  It is only used for sanity checking and is
   // not a real lock.
   bool locked_;
 
+  xmlDocPtr doc_;
   xmlBufferPtr buffer_;
   xmlTextWriterPtr writer_;
   int num_events_;  // the number of events recorded in this log