Record logout time stats for Chrome OS.

Record lougout time stats and dump it to /tmp/logout-times-sent.
ShutdownTime.Logout, ShutdownTime.UIMessageLoopEnded, and
ShutdownTime.BrowserDeleted will be sent to UMA, as well.

% cat /tmp/logout-times-sent
ShutdownTime.Logout: 0.39
0.00 +0.00 LogoutStarted
0.00 +0.00 ShutdownDetected
0.02 +0.02 StartedClosingWindows
0.27 +0.25 UIMessageLoopEnded
0.27 +0.00 BrowserShutdownStarted
0.39 +0.12 BrowserDeleted
0.39 +0.00 BrowserMainEnded

Along the way, change BootTimesLoader to append data to existing
/tmp/uptime-* files just like /sbin/bootstat does, so we can collect
numbers from 2nd login as well.

BUG=chromium-os:6847
TEST=confirmed that /tmp/login-times-sent and /tmp/logout-times-sent are written properly.

Review URL: http://codereview.chromium.org/4973002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@66923 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 12 insertions, 0 deletions

diff --git a/chrome/browser/browser_shutdown.cc b/chrome/browser/browser_shutdown.cc
index 8f1fb80..e136ef8 100644
--- a/chrome/browser/browser_shutdown.cc
+++ b/chrome/browser/browser_shutdown.cc
@@ -43,6 +43,10 @@
 #include "chrome/browser/rlz/rlz.h"
 #endif
 
+#if defined(OS_CHROMEOS)
+#include "chrome/browser/chromeos/boot_times_loader.h"
+#endif
+
 using base::Time;
 using base::TimeDelta;
 
@@ -101,6 +105,10 @@ FilePath GetShutdownMsPath() {
 }
 
 void Shutdown() {
+#if defined(OS_CHROMEOS)
+  chromeos::BootTimesLoader::Get()->AddLogoutTimeMarker(
+      "BrowserShutdownStarted", false);
+#endif
   // During shutdown we will end up some blocking operations.  But the
   // work needs to get done and we're going to wait for them no matter
   // what thread they're on, so don't worry about it slowing down
@@ -162,6 +170,10 @@ void Shutdown() {
   // before calling UninstallJankometer().
   delete g_browser_process;
   g_browser_process = NULL;
+#if defined(OS_CHROMEOS)
+  chromeos::BootTimesLoader::Get()->AddLogoutTimeMarker("BrowserDeleted",
+                                                        true);
+#endif
 
   // Uninstall Jank-O-Meter here after the IO thread is no longer running.
   UninstallJankometer();