Cleaned up some constants for stats reading

chrome/browser/chromeos/boot_times_loader.h

Index: chrome/browser/chromeos/boot_times_loader.h
diff --git a/chrome/browser/chromeos/boot_times_loader.h b/chrome/browser/chromeos/boot_times_loader.h
index 359202705618ca4c7d0909fc976a66ad677f76e2..51caaa373226fec4f52af33776e2f37053cf8051 100644
--- a/chrome/browser/chromeos/boot_times_loader.h
+++ b/chrome/browser/chromeos/boot_times_loader.h
@@ -54,6 +54,21 @@ class BootTimesLoader : public CancelableRequestProvider {
       CancelableRequestConsumerBase* consumer,
       GetBootTimesCallback* callback);
 
+  // Records current uptime and disk usage for metrics use.
+  // Posts task to file thread.
+  // name will be used as part of file names in /tmp.
+  // Existing stats files will not be overwritten.
+  static void RecordCurrentStats(const std::string& name);
+
+  // Saves away the stats at main, so the can be recorded later. At main() time
+  // the necessary threads don't exist yet for recording the data.
+  static void SaveChromeMainStats();
+
+  // Records the data previously saved by SaveChromeMainStats(), using the
+  // file thread.
+  // Existing stats files will not be overwritten.
+  static void RecordChromeMainStats();
+
  private:
   // BootTimesLoader calls into the Backend on the file thread to load
   // and extract the boot times.