Add GPUMapMode/Flags and expose GPUDeviceLostInfo on workers

Add GPUMapMode/GPUMapModeFlags definitions, in prep for implementing the
new WebGPU buffer mapping primitives.

GPUDevice.lost is exposed on workers; it was just a small mistake that
GPUDeviceLostInfo wasn't as well.

Bug: 1069302
Change-Id: Icc54e28d1b65b05a8d189dda9ce4dad1e0ec29d8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2305022Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Yuki Shiino <yukishiino@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#789816}

third_party/blink/renderer/bindings/idl_in_modules.gni

@@ -867,6 +867,7 @@ static_idl_files_in_modules = get_path_info(
           "//third_party/blink/renderer/modules/webgpu/gpu_fence_descriptor.idl",
           "//third_party/blink/renderer/modules/webgpu/gpu_image_bitmap_copy_view.idl",
           "//third_party/blink/renderer/modules/webgpu/gpu_limits.idl",
+          "//third_party/blink/renderer/modules/webgpu/gpu_map_mode.idl",
           "//third_party/blink/renderer/modules/webgpu/gpu_object_descriptor_base.idl",
           "//third_party/blink/renderer/modules/webgpu/gpu_origin_2d_dict.idl",
           "//third_party/blink/renderer/modules/webgpu/gpu_origin_3d_dict.idl",

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

@@ -41,6 +41,7 @@ blink_modules_sources("webgpu") {
     "gpu_device_lost_info.h",
     "gpu_fence.cc",
     "gpu_fence.h",
+    "gpu_map_mode.h",
     "gpu_out_of_memory_error.cc",
     "gpu_out_of_memory_error.h",
     "gpu_pipeline_layout.cc",

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

@@ -5,8 +5,7 @@
 // https://gpuweb.github.io/gpuweb/
 
 [
-    Exposed=Window,
-    RuntimeEnabled=WebGPU
+    Exposed(Window WebGPU, Worker WebGPU)
 ] interface GPUDeviceLostInfo {
     readonly attribute DOMString message;
 };

third_party/blink/renderer/modules/webgpu/gpu_map_mode.h

+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_WEBGPU_GPU_MAP_MODE_H_
+#define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBGPU_GPU_MAP_MODE_H_
+
+#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
+
+namespace blink {
+
+class GPUMapMode : public ScriptWrappable {
+  DEFINE_WRAPPERTYPEINFO();
+
+ public:
+  // gpu_map_mode.idl
+  static constexpr uint32_t kRead = 1;
+  static constexpr uint32_t kWrite = 2;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(GPUMapMode);
+};
+
+}  // namespace blink
+
+#endif  // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBGPU_GPU_MAP_MODE_H_

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

+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// https://gpuweb.github.io/gpuweb/#typedefdef-gpumapmodeflags
+
+typedef [EnforceRange] unsigned long GPUMapModeFlags;
+[
+    Exposed(Window WebGPU, Worker WebGPU)
+] interface GPUMapMode {
+    const unsigned long READ  = 0x0001;
+    const unsigned long WRITE = 0x0002;
+};

third_party/blink/renderer/modules/webgpu/idls.gni

@@ -18,6 +18,7 @@ modules_idl_files = [
   "gpu_device.idl",
   "gpu_device_lost_info.idl",
   "gpu_fence.idl",
+  "gpu_map_mode.idl",
   "gpu_out_of_memory_error.idl",
   "gpu_pipeline_layout.idl",
   "gpu_queue.idl",