ThreadWacther - delete the code for Android that collected stats for

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 e93b6fed5117bf81a61998f9f9e443fcde28292f..e7843a205b61796640db562cbbd448eb25724a60 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -34087,6 +34087,9 @@ Therefore, the affected-histogram name has to have at least one dot in it.
 
 <histogram name="StartupTimeBomb.Alarm" units="milliseconds">
   <owner>rtenneti@chromium.org</owner>
+  <obsolete>
+    Deprecated as of 10/2014.
+  </obsolete>
   <summary>
     Time duration measured from the time the startup timebomb was started and
     when it went off.
@@ -57571,6 +57574,9 @@ To add a new entry, add it with any value and run test to compute valid value.
 </histogram_suffixes>
 
 <histogram_suffixes name="StartupTimeBombAlarm" separator=".">
+  <obsolete>
+    Deprecated as of 10/2014.
+  </obsolete>
   <suffix name="ThreadNowDuration" label="Duration is in thread CPU time."/>
   <suffix name="TimeDuration" label="Duration is in clock time."/>
   <suffix name="TimeTicksDuration" label="Duration is in TimeTicks time."/>