Move autotest_stats stats to monarch metrics

BUG=chromium:667171
TEST=utils/unittest_suite

Change-Id: I8cc4ca866df514e791845c676409d2230615cff3
Reviewed-on: https://chromium-review.googlesource.com/414187
Commit-Ready: Ningning Xia <nxia@chromium.org>
Tested-by: Ningning Xia <nxia@chromium.org>
Reviewed-by: Ningning Xia <nxia@chromium.org>
diff --git a/site_utils/gmail_lib.py b/site_utils/gmail_lib.py
index 3917deb..77b6a60 100755
--- a/site_utils/gmail_lib.py
+++ b/site_utils/gmail_lib.py
@@ -26,7 +26,7 @@
 
 import common
 from autotest_lib.client.common_lib import global_config
-from autotest_lib.client.common_lib.cros.graphite import autotest_stats
+from autotest_lib.server import site_utils
 
 try:
   from apiclient.discovery import build as apiclient_build
@@ -40,9 +40,9 @@
 # of a sys.path war between chromite and autotest crbug.com/622988
 from autotest_lib.server import utils as server_utils
 from chromite.lib import retry_util
+from chromite.lib import metrics
 
 
-EMAIL_COUNT_KEY = 'emails.%s'
 DEFAULT_CREDS_FILE = global_config.global_config.get_config_value(
         'NOTIFICATIONS', 'gmail_api_credentials', default=None)
 RETRY_DELAY = 5
@@ -164,13 +164,13 @@
             logging.warning('Will retry error %s', exc)
         return should_retry
 
-    autotest_stats.Counter(EMAIL_COUNT_KEY % 'total').increment()
+    metrics.Counter('chromeos/autotest/send_email/total').increment()
     try:
         retry_util.GenericRetry(
                 handler, retry_count, _run, sleep=RETRY_DELAY,
                 backoff_factor=RETRY_BACKOFF_FACTOR)
     except Exception:
-        autotest_stats.Counter(EMAIL_COUNT_KEY % 'fail').increment()
+        metrics.Counter('chromeos/autotest/send_email/fail').increment()
         raise
 
 
@@ -188,4 +188,6 @@
         sys.exit(1)
 
     message_text = sys.stdin.read()
-    send_email(','.join(args.recipients), args.subject , message_text)
+
+    with site_utils.SetupTsMonGlobalState('gmail_lib', short_lived=True):
+        send_email(','.join(args.recipients), args.subject , message_text)