bluetooth: Implement acceptAllDevices

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 03dd7c2f1dd5ec705ea91584b924fbe6c3584b63..ff1b5e96d6b18a8ff542d1bc3a70c8ea48adec78 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -4830,6 +4830,18 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Bluetooth.Web.RequestDevice.Options.AcceptAllDevices"
+    enum="Boolean">

[Ilya Sherman, 2016/11/29 03:21:40]

Please provide a custom boolean enum, with labels specific to this histogram. 
(Only need a change in histograms.xml to do this -- the C++ code to record the
histogram is fine.)

[ortuno, 2016/11/29 04:48:10]

hmm I changed the description to better match what we record. I tried adding a
custom boolean but it ended up looking like the following:

<enum name="BooleanAcceptAllDevices">
  <int value="0" label="acceptAllDevices: false"/>
  <int value="1" label="acceptAllDevices: true"/>
</enum>

Which seemed a bit unnecessary. I'm happy to add it if you think it's the right
way.

[Ilya Sherman, 2016/11/29 04:54:14]

Fair enough, thanks.

+  <owner>jyasskin@chromium.org</owner>
+  <owner>ortuno@chromium.org</owner>
+  <owner>scheib@chromium.org</owner>
+  <summary>
+    Records if 'acceptAllDevices' was used in RequestDeviceOptions. These
+    results will help us better understand the uses of the API and make changes
+    according to developers' behavior.
+  </summary>
+</histogram>
+
 <histogram name="Bluetooth.Web.RequestDevice.Outcome"
     enum="WebBluetoothRequestDeviceOutcome">
   <owner>jyasskin@chromium.org</owner>
@@ -75722,6 +75734,7 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="155" label="MDDH_INVALID_SUBSCRIPTION_REQUEST"/>
   <int value="156" label="MDDH_INVALID_UNSUBSCRIPTION_REQUEST"/>
   <int value="157" label="AOAH_NONSENSE_DEVICE_ID"/>
+  <int value="158" label="BDH_INVALID_OPTIONS"/>
 </enum>
 
 <enum name="BadMessageReasonExtensions" type="int">