Merge commit '15e74b9da8b4cda11ee54da1e77a02d1a86c944a'
* commit '15e74b9da8b4cda11ee54da1e77a02d1a86c944a':
Temporarily suppress flaky test LocationManagerProximityTest until test harness support can be rolled out.
Fix build breakage
Revise the ImageButton class description to include information
Record statistics about whether HTTP connections are reused.