Disable ACTION_BOOT_COMPLETED event for 3rd party apps.

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index e73829160649581e024f99ab03965d8e25a9f65b..fac0833b4128622b62c124e88dfa8eaa414c67bd 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -86353,6 +86353,7 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="-1930720286" label="nacl-debug-mask"/>
   <int value="-1928198763" label="enable-async-dns"/>
   <int value="-1925117279" label="disable-quic-https"/>
+  <int value="-1922697944" label="DisableArcBootCompletedBroadcast:disabled"/>

[Alexei Svitkine (slow), 2016/10/03 15:04:32]

Please fix these, however.

[xzhou, 2016/10/03 20:08:41]

Done.

   <int value="-1915854488" label="enable-offline-pages"/>
   <int value="-1912999136" label="enable-automatic-password-saving:enabled"/>
   <int value="-1911153473" label="enable-easy-signin"/>
@@ -86522,6 +86523,7 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="-1077752943" label="enable-password-generation"/>
   <int value="-1075156797" label="enable-brotli"/>
   <int value="-1075089382" label="enable-physical-web"/>
+  <int value="-1068498626" label="DisableArcBootCompletedBroadcast:enabled"/>
   <int value="-1062119671" label="enable-password-force-saving"/>
   <int value="-1056310158" label="disable-memory-pressure-chromeos"/>
   <int value="-1052782474" label="enable-cloud-devices"/>