Instrument GPUAdapter.name for identifiability study.

Bug: 973801
Change-Id: I1f0b2fffc7a3b7ed153f6d23227795888bbc943c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2354150
Commit-Queue: Chris Fredrickson <cfredric@google.com>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#798449}

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

@@ -2732,6 +2732,7 @@ enum WebFeature {
   kBluetoothRemoteGATTCharacteristic_Uuid = 3402,
   kBluetoothRemoteGATTDescriptor_Uuid = 3403,
   kBluetoothRemoteGATTService_Uuid = 3404,
+  kGPUAdapter_Name = 3405,
 
   // 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/webgpu/gpu_adapter.idl

@@ -13,7 +13,7 @@ enum GPUExtensionName {
 [
     Exposed(Window WebGPU, Worker WebGPU)
 ] interface GPUAdapter {
-    readonly attribute DOMString name;
+    [HighEntropy=Direct, MeasureAs=GPUAdapter_Name] readonly attribute DOMString name;
     [CallWith=ScriptState, SameObject] readonly attribute FrozenArray<GPUExtensionName> extensions;
 
     [CallWith=ScriptState] Promise<GPUDevice> requestDevice(optional GPUDeviceDescriptor descriptor = {});

tools/metrics/histograms/enums.xml

@@ -28752,6 +28752,7 @@ Called by update_use_counter_feature_enum.py.-->
   <int value="3402" label="BluetoothRemoteGATTCharacteristic_Uuid"/>
   <int value="3403" label="BluetoothRemoteGATTDescriptor_Uuid"/>
   <int value="3404" label="BluetoothRemoteGATTService_Uuid"/>
+  <int value="3405" label="GPUAdapter_Name"/>
 </enum>
 
 <enum name="FeaturePolicyAllowlistType">