Delete geofencing implementation.

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 3921956b4b61c6d2c30b9ad797a7e54f7f63f745..a73ec22af1d5d26fc2b8e809b2d85f34e5a36dce 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -84797,7 +84797,7 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="3" label="SYNC"/>
   <int value="4" label="NOTIFICATION_CLICK"/>
   <int value="5" label="PUSH"/>
-  <int value="6" label="GEOFENCING"/>
+  <int value="6" label="GEOFENCING (unused)"/>
   <int value="7" label="SERVICE_PORT_CONNECT (unused)"/>
   <int value="8" label="MESSAGE"/>
   <int value="9" label="NOTIFICATION_CLOSE"/>
@@ -94432,7 +94432,6 @@ To add a new entry, add it with any value and run test to compute valid value.
   <suffix name="SYNC" label="SYNC"/>
   <suffix name="NOTIFICATION_CLICK" label="NOTIFICATION_CLICK"/>
   <suffix name="PUSH" label="PUSH"/>
-  <suffix name="GEOFENCING" label="GEOFENCING"/>

[Mark P, 2016/05/11 22:52:23]

Please mark this suffix as obsolete:
<suffix name="GEOFENCING" label="GEOFENCING">
    <obsolete>
      Deprecated as of *** because ***
    </obsolete>
</suffix>

[Marijn Kruisselbrink, 2016/05/11 23:04:51]

Done

   <suffix name="MESSAGE" label="MESSAGE"/>
   <suffix name="NOTIFICATION_CLOSE" label="NOTIFICATION_CLOSE"/>
   <suffix name="FETCH_MAIN_FRAME" label="FETCH_MAIN_FRAME"/>