Query API: Add extension name of pipeline-statistics-query in Blink

The creation of query set with the type of pipeline-statistics is
supported on all backends, but its extension is not enabled in
blink, add the extension name of pipeline statistics query for
testing query set creation.

Bug: dawn:434
Change-Id: I507ab9dbcf87725392b2c105c40769a9f007c4b5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2607695
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#840286}

gpu/command_buffer/service/webgpu_decoder_impl.cc

@@ -676,7 +676,9 @@ error::Error WebGPUDecoderImpl::InitDawnDeviceAndSetWireServer(
   if (request_device_properties.shaderFloat16) {
     device_descriptor.requiredExtensions.push_back("shader_float16");
   }
-
+  if (request_device_properties.pipelineStatisticsQuery) {
+    device_descriptor.requiredExtensions.push_back("pipeline_statistics_query");
+  }
   if (request_device_properties.timestampQuery) {
     device_descriptor.requiredExtensions.push_back("timestamp_query");
   }

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

@@ -30,6 +30,8 @@ WGPUDeviceProperties AsDawnType(const GPUDeviceDescriptor* descriptor) {
       extension_set.Contains("texture-compression-bc");
   requested_device_properties.shaderFloat16 =
       extension_set.Contains("shader-float16");
+  requested_device_properties.pipelineStatisticsQuery =
+      extension_set.Contains("pipeline-statistics-query");
   requested_device_properties.timestampQuery =
       extension_set.Contains("timestamp-query");
 
@@ -85,6 +87,9 @@ void GPUAdapter::InitializeExtensionNameList() {
   if (adapter_properties_.shaderFloat16) {
     extension_name_list_.emplace_back("shader-float16");
   }
+  if (adapter_properties_.pipelineStatisticsQuery) {
+    extension_name_list_.emplace_back("pipeline-statistics-query");
+  }
   if (adapter_properties_.timestampQuery) {
     extension_name_list_.emplace_back("timestamp-query");
   }

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

@@ -5,6 +5,7 @@
 // https://gpuweb.github.io/gpuweb/
 
 enum GPUExtensionName {
+    "pipeline-statistics-query",
     "texture-compression-bc",
     "timestamp-query",
     "shader-float16"