metrics daemon: change location of flag files

For security reasons, we changed the location of some flag
files to /var/run from /tmp, but we didn't update this
program to look for the files in their new location.
This corrects the problem.

BUG=chromium:200181
TEST=manually verified that kernel crash counters increase
BRANCH=none

Change-Id: I03efe6179a1ad8dfd4c8cbb1eccf24c7a8494058
Reviewed-on: https://chromium-review.googlesource.com/186692
Reviewed-by: Chris Masone <cmasone@chromium.org>
Commit-Queue: Luigi Semenzato <semenzato@chromium.org>
Tested-by: Luigi Semenzato <semenzato@chromium.org>
diff --git a/metrics/metrics_daemon.cc b/metrics/metrics_daemon.cc
index 01fec16..44d8d4f 100644
--- a/metrics/metrics_daemon.cc
+++ b/metrics/metrics_daemon.cc
@@ -52,9 +52,9 @@
 static const int kUseMonitorIntervalInit = 1 * kSecondsPerMinute;
 static const int kUseMonitorIntervalMax = 10 * kSecondsPerMinute;
 
-const char kKernelCrashDetectedFile[] = "/tmp/kernel-crash-detected";
+const char kKernelCrashDetectedFile[] = "/var/run/kernel-crash-detected";
 static const char kUncleanShutdownDetectedFile[] =
-      "/tmp/unclean-shutdown-detected";
+      "/var/run/unclean-shutdown-detected";
 
 // static metrics parameters
 const char MetricsDaemon::kMetricDailyUseTimeName[] =