Auto merge of #25700 - szeged:wgpu_compute_pipeline, r=jdm

Initial implementation of GPUComputePipeline

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Added WebIDL bindings for `GPUComputePipeline`.
Implemented the `createComputePipeline` function of `GPUDevice`.
This pull request is based on: #25677

---
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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes addresses a part of #24706

cc @kvark @jdm @zakorgy
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components/script/dom/webidls/GPUComputePipeline.webidl

@@ -0,0 +1,22 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+// https://gpuweb.github.io/gpuweb/#gpucomputepipeline
+[Exposed=(Window, DedicatedWorker), Serializable, Pref="dom.webgpu.enabled"]
+interface GPUComputePipeline {
+};
+GPUComputePipeline includes GPUObjectBase;
+
+dictionary GPUPipelineDescriptorBase : GPUObjectDescriptorBase {
+    required GPUPipelineLayout layout;
+};
+
+dictionary GPUProgrammableStageDescriptor {
+    required GPUShaderModule module;
+    required DOMString entryPoint;
+};
+
+dictionary GPUComputePipelineDescriptor : GPUPipelineDescriptorBase {
+    required GPUProgrammableStageDescriptor computeStage;
+};

components/script/dom/webidls/GPUDevice.webidl

@@ -20,8 +20,8 @@ interface GPUDevice : EventTarget {
     GPUBindGroup createBindGroup(GPUBindGroupDescriptor descriptor);
 
     GPUShaderModule createShaderModule(GPUShaderModuleDescriptor descriptor);
-    /*GPUComputePipeline createComputePipeline(GPUComputePipelineDescriptor descriptor);
-    GPURenderPipeline createRenderPipeline(GPURenderPipelineDescriptor descriptor);
+    GPUComputePipeline createComputePipeline(GPUComputePipelineDescriptor descriptor);
+    /*GPURenderPipeline createRenderPipeline(GPURenderPipelineDescriptor descriptor);
 
     GPUCommandEncoder createCommandEncoder(optional GPUCommandEncoderDescriptor descriptor = {});
     GPURenderBundleEncoder createRenderBundleEncoder(GPURenderBundleEncoderDescriptor descriptor);