Instrument direct surfaces of BluetoothDevice.

Bug: 973801
Change-Id: I7f50ede21dd71a63702b3b9e478f7c37bae2d01b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2362869
Commit-Queue: Caleb Raitto <caraitto@chromium.org>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#800255}

third_party/blink/public/mojom/web_feature/web_feature.mojom

@@ -2762,6 +2762,7 @@ enum WebFeature {
   kCrossOriginOpenerPolicyReporting= 3433,
   kGamepadId = 3434,
   kElementAttachInternals = 3435,
+  kBluetoothDeviceName = 3436,
 
   // Add new features immediately above this line. Don't change assigned
   // numbers of any item, and don't reuse removed slots.

third_party/blink/renderer/modules/bluetooth/bluetooth_device.idl

@@ -19,7 +19,7 @@
       optional WatchAdvertisementsOptions options = {});
 
   readonly attribute DOMString id;
-  readonly attribute DOMString? name;
+  [HighEntropy=Direct, MeasureAs=BluetoothDeviceName] readonly attribute DOMString? name;
   readonly attribute BluetoothRemoteGATTServer gatt;
   [RuntimeEnabled=WebBluetoothWatchAdvertisements] readonly attribute boolean watchingAdvertisements;
 

tools/metrics/histograms/enums.xml

@@ -28867,6 +28867,7 @@ Called by update_use_counter_feature_enum.py.-->
   <int value="3433" label="CrossOriginOpenerPolicyReporting"/>
   <int value="3434" label="GamepadId"/>
   <int value="3435" label="ElementAttachInternals"/>
+  <int value="3436" label="BluetoothDeviceName"/>
 </enum>
 
 <enum name="FeaturePolicyAllowlistType">