[WebGPU] Remove NONE=0 flags/bits

Following WebGPU spec change https://github.com/gpuweb/gpuweb/pull/461,
this CL removes NONE=0 flags/bits.

Change-Id: I675d6cbd9df8f30138276cef94f9a24e9e33a008
Bug: 877147
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1845762
Commit-Queue: François Beaufort <beaufort.francois@gmail.com>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#703653}

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

@@ -14,7 +14,6 @@ class GPUBufferUsage : public ScriptWrappable {
 
  public:
   // gpu_buffer_usage.idl
-  static constexpr uint32_t kNone = 0;
   static constexpr uint32_t kMapRead = 1;
   static constexpr uint32_t kMapWrite = 2;
   static constexpr uint32_t kCopySrc = 4;

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

@@ -8,7 +8,6 @@ typedef unsigned long GPUBufferUsageFlags;
 [
     RuntimeEnabled=WebGPU
 ] interface GPUBufferUsage {
-    const GPUBufferUsageFlags NONE = 0;
     const GPUBufferUsageFlags MAP_READ = 1;
     const GPUBufferUsageFlags MAP_WRITE = 2;
     const GPUBufferUsageFlags COPY_SRC = 4;

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

@@ -14,7 +14,6 @@ class GPUColorWrite : public ScriptWrappable {
 
  public:
   // gpu_color_write.idl
-  static constexpr uint32_t kNone = 0;
   static constexpr uint32_t kRed = 1;
   static constexpr uint32_t kGreen = 2;
   static constexpr uint32_t kBlue = 4;

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

@@ -8,7 +8,6 @@ typedef unsigned long GPUColorWriteFlags;
 [
     RuntimeEnabled=WebGPU
 ] interface GPUColorWrite {
-    const GPUColorWriteFlags NONE = 0;
     const GPUColorWriteFlags RED = 1;
     const GPUColorWriteFlags GREEN = 2;
     const GPUColorWriteFlags BLUE = 4;

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

@@ -14,7 +14,6 @@ class GPUShaderStage : public ScriptWrappable {
 
  public:
   // gpu_shader_stage.idl
-  static constexpr uint32_t kNone = 0;
   static constexpr uint32_t kVertex = 1;
   static constexpr uint32_t kFragment = 2;
   static constexpr uint32_t kCompute = 4;

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

@@ -8,7 +8,6 @@ typedef unsigned long GPUShaderStageFlags;
 [
     RuntimeEnabled=WebGPU
 ] interface GPUShaderStage {
-    const GPUShaderStageFlags NONE = 0;
     const GPUShaderStageFlags VERTEX = 1;
     const GPUShaderStageFlags FRAGMENT = 2;
     const GPUShaderStageFlags COMPUTE = 4;

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

@@ -14,7 +14,6 @@ class GPUTextureUsage : public ScriptWrappable {
 
  public:
   // gpu_texture_usage.idl
-  static constexpr uint32_t kNone = 0;
   static constexpr uint32_t kCopySrc = 1;
   static constexpr uint32_t kCopyDst = 2;
   static constexpr uint32_t kSampled = 4;

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

@@ -8,7 +8,6 @@ typedef unsigned long GPUTextureUsageFlags;
 [
     RuntimeEnabled=WebGPU
 ] interface GPUTextureUsage {
-    const GPUTextureUsageFlags NONE = 0;
     const GPUTextureUsageFlags COPY_SRC = 1;
     const GPUTextureUsageFlags COPY_DST = 2;
     const GPUTextureUsageFlags SAMPLED = 4;