Implement changes to WebGPU timestamp-query

Remove call to GPURenderPassEncoder.writeTimestamp as it is not part of
the spec anymore, and was removed by Chrome. It is also not needed
anymore.

The new interface, GPURenderPassDescriptor.timestampWrites was already
implemented so nothing is needed there.

src/platform/graphics/webgpu/webgpu-gpu-profiler.js

@@ -21,47 +21,18 @@ class WebgpuGpuProfiler extends GpuProfiler {
         this.timestampQueriesSet = null;
     }
 
-    frameMarker(isStart) {
-
-        if (this.timestampQueriesSet) {
-
-            const suffix = isStart ? 'Start' : 'End';
-            const commandEncoder = this.device.wgpu.createCommandEncoder();
-            DebugHelper.setLabel(commandEncoder, `GPUTimestampEncoder-${suffix}`);
-
-            this.frameGPUMarkerSlot = isStart ? this.getSlot('GpuFrame') : this.frameGPUMarkerSlot;
-            commandEncoder.writeTimestamp(this.timestampQueriesSet.querySet, this.frameGPUMarkerSlot * 2 + (isStart ? 0 : 1));
-
-            const cb = commandEncoder.finish();
-            DebugHelper.setLabel(cb, `GPUTimestampEncoder-${suffix}-CommandBuffer`);
-
-            this.device.addCommandBuffer(cb, isStart);
-        }
-    }
-
     frameStart() {
-
         this.processEnableRequest();
-
-        if (this._enabled) {
-            // initial timing marker
-            this.frameMarker(true);
-        }
     }
 
     frameEnd() {
-
         if (this._enabled) {
-            // final timing marker
-            this.frameMarker(false);
-
             // schedule command buffer where timestamps are copied to CPU
             this.timestampQueriesSet?.resolve(this.slotCount * 2);
         }
     }
 
     request() {
-
         if (this._enabled) {
             // request results
             const renderVersion = this.device.renderVersion;

src/platform/graphics/webgpu/webgpu-graphics-device.js

@@ -222,10 +222,7 @@ class WebgpuGraphicsDevice extends GraphicsDevice {
         this.extCompressedTextureS3TC = requireFeature('texture-compression-bc');
         this.extCompressedTextureETC = requireFeature('texture-compression-etc2');
         this.extCompressedTextureASTC = requireFeature('texture-compression-astc');
-
-        // Do not request timestamp feature as it has changed and current form is not supported.
-        // See engine issue #5989
-        // this.supportsTimestampQuery = requireFeature('timestamp-query');
+        this.supportsTimestampQuery = requireFeature('timestamp-query');
 
         this.textureRG11B10Renderable = requireFeature('rg11b10ufloat-renderable');
         Debug.log(`WEBGPU features: ${requiredFeatures.join(', ')}`);