Add a default for GPURenderPassColorAttachmentDescriptor.storeOp - #376

Following WebGPU spec change at gpuweb/gpuweb#376,
GPURenderPassColorAttachmentDescriptor.storeOp default should be "store".

Bug: 877147
Change-Id: I7dd5db4e3cfcb0ddc4dd132342d8bf145bb8f28e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1715186
Reviewed-by: François Beaufort <beaufort.francois@gmail.com>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: François Beaufort <beaufort.francois@gmail.com>
Cr-Commit-Position: refs/heads/master@{#691530}

…web#376)

Supersedes gpuweb#268.

* Add a component type for GPUBGLBinding compatiblity (#384)

In shaders there are several texture types for each dimensionality
depending on their component type. It can be either float, uint or
sint, with maybe in the future depth/stencil if WebGPU allows reading
such textures.

The component type of a GPUTextureView's format must match the
component type of its binding in the shader module. This is for
several reasons:

 - Vulkan requires the following: "The Sampled Type of an
OpTypeImage declaration must match the numeric format of the
corresponding resource in type and signedness, as shown in the
SPIR-V Sampled Type column of the Interpretation of Numeric Format
table, or the values obtained by reading or sampling from this image
are undefined."

 - It is also required in OpenGL for the texture units to be complete,
a uint or sint texture unit used with a non-nearest sampler is
incomplete and returns black texels.

Similar constraints must exist in other APIs.

To encode this compatibility constraint, a new member is added to
GPUBindGroupLayoutBinding that is a new enum GPUTextureComponentType
that give the component type of the texture.

* Make GPUBGLBinding.textureDimension default to 2d.

This is the most common case and avoids having an optional dictionary
member with no default value (but that still requires a value for
texture bindings).

* Add a component type for GPUBGLBinding compatiblity (#384)

In shaders there are several texture types for each dimensionality
depending on their component type. It can be either float, uint or
sint, with maybe in the future depth/stencil if WebGPU allows reading
such textures.

The component type of a GPUTextureView's format must match the
component type of its binding in the shader module. This is for
several reasons:

 - Vulkan requires the following: "The Sampled Type of an
OpTypeImage declaration must match the numeric format of the
corresponding resource in type and signedness, as shown in the
SPIR-V Sampled Type column of the Interpretation of Numeric Format
table, or the values obtained by reading or sampling from this image
are undefined."

 - It is also required in OpenGL for the texture units to be complete,
a uint or sint texture unit used with a non-nearest sampler is
incomplete and returns black texels.

Similar constraints must exist in other APIs.

To encode this compatibility constraint, a new member is added to
GPUBindGroupLayoutBinding that is a new enum GPUTextureComponentType
that give the component type of the texture.

* Make GPUBGLBinding.textureDimension default to 2d.

This is the most common case and avoids having an optional dictionary
member with no default value (but that still requires a value for
texture bindings).

* unifinished createBindGroupLayout algorithm

* draft of BindGroupLayout details

* draft of BindGroupLayout details

* polish before PR

* fix typo

* replace u32/i32/u64 with normal int types or specific typedefs (#423)

* Do not require vertexInput in GPURenderPipelineDescriptor (#378)

* Add a default for GPURenderPassColorAttachmentDescriptor.storeOp (#376)

Supersedes #268.

* Initial spec for GPUDevice.createBuffer (#419)

* Start writing spec for device/adapter, introduce internal objects (#422)

* Move validation rules out of algorithm body and better describe GPUBindGroupLayout internal slots

* Include limits for dynamic offset buffers

* Rename 'dynamic' boolean to 'hasDynamicOffsets'

* Fix indentation for ci bot

* More indentation errors

* Fix var typos

* Fix method definition

* Fix enum references

* Missing </dfn> tag

* Missing </dfn> tag

* Remove bad [= =]

* Fix old constant name

* Half-formed new validation rule structure for createBindGroupLayout

* An interface -> the interface

* Remove old 'layout binding' reference

* fix device lost validation reference

* Fix 'dynamic' typo