GPUDevice and webgpu canvas context ukm metrics

New UKM metrics Request doc: go/client-rendering-api-ukm-review

A follow up of http://crrev.com/c/2473043

Adding UKM metrics collection for WebGPU canvas context and GPUDevice request

Bug: 1135706
Change-Id: I0432ad82f5f5a99c85d966ca3b8ff58a5be3cecd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2501069Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Shrek Shao <shrekshao@google.com>
Cr-Commit-Position: refs/heads/master@{#821577}

third_party/blink/renderer/modules/webgpu/BUILD.gn

@@ -81,6 +81,7 @@ blink_modules_sources("webgpu") {
   ]
   deps = [
     "//gpu/command_buffer/client:webgpu_interface",
+    "//services/metrics/public/cpp:ukm_builders",
     "//third_party/dawn/src/dawn:dawn_headers",
   ]
 }

third_party/blink/renderer/modules/webgpu/DEPS

@@ -7,4 +7,5 @@ include_rules = [
     "+gpu/command_buffer/common/sync_token.h",
     "+gpu/command_buffer/client/shared_image_interface.h",
     "+gpu/command_buffer/client/webgpu_interface.h",
+    "+services/metrics/public/cpp/ukm_builders.h",
 ]

third_party/blink/renderer/modules/webgpu/gpu_adapter.cc

@@ -4,6 +4,7 @@
 
 #include "third_party/blink/renderer/modules/webgpu/gpu_adapter.h"
 
+#include "services/metrics/public/cpp/ukm_builders.h"
 #include "third_party/blink/renderer/bindings/core/v8/script_promise_resolver.h"
 #include "third_party/blink/renderer/bindings/core/v8/v8_object_builder.h"
 #include "third_party/blink/renderer/bindings/modules/v8/v8_gpu_device_descriptor.h"
@@ -67,6 +68,9 @@ void GPUAdapter::OnRequestDeviceCallback(ScriptPromiseResolver* resolver,
         execution_context, GetDawnControlClient(), this, device_client_id,
         descriptor);
     resolver->Resolve(device);
+    ukm::builders::ClientRenderingAPI(execution_context->UkmSourceID())
+        .SetGPUDevice(static_cast<int>(true))
+        .Record(execution_context->UkmRecorder());
   } else {
     resolver->Reject(MakeGarbageCollected<DOMException>(
         DOMExceptionCode::kOperationError,

third_party/blink/renderer/modules/webgpu/gpu_canvas_context.cc

@@ -17,7 +17,12 @@ GPUCanvasContext::Factory::~Factory() {}
 CanvasRenderingContext* GPUCanvasContext::Factory::Create(
     CanvasRenderingContextHost* host,
     const CanvasContextCreationAttributesCore& attrs) {
-  return MakeGarbageCollected<GPUCanvasContext>(host, attrs);
+  CanvasRenderingContext* rendering_context =
+      MakeGarbageCollected<GPUCanvasContext>(host, attrs);
+  DCHECK(host);
+  rendering_context->RecordUKMCanvasRenderingAPI(
+      CanvasRenderingContext::CanvasRenderingAPI::kWebgpu);
+  return rendering_context;
 }
 
 CanvasRenderingContext::ContextType GPUCanvasContext::Factory::GetContextType()