Obtain WiFi SSID on Android using Android APIs

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 b42a3eca2dea017f4bf527e01f3bcd66adec0927..62847005a9e3d47d1d1ddf4ede5ff8a7e469a9be 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -34848,6 +34848,17 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="NQE.NetworkIdAvailable" enum="BooleanAvailable">
+  <owner>tbansal@chromium.org</owner>
+  <owner>bengr@chromium.org</owner>
+  <summary>
+    Whether the network ID (SSID of the Wi-Fi network, or the MCC/MNC operator
+    of the cellular network) was available or not. Recorded only on Wi-Fi and
+    cellular networks. Recorded right after the connection type changes.
+    Recorded only on Wi-Fi and cellular connections.

[Not at Google. Contact bengr, 2016/06/23 20:08:56]

"Recorded only on Wi-Fi and cellular" is repeated.

Also, would a rename to IsNetworkIdAvailable be more appropriate to reflect that
this is a boolean, as opposed to actually containing the available network id?

[tbansal1, 2016/06/27 19:48:20]

Done.

+  </summary>
+</histogram>
+
 <histogram name="NQE.PeakKbps" units="Kbps">
   <owner>bengr@chromium.org</owner>
   <owner>tbansal@chromium.org</owner>