Sort the struct forward declarations.

When generating webgpu.h in the dawn generator sort the forward
declarations of structures in order to match the upstream webgpu.h
header.

Bug: 465339954
Change-Id: I7ffd9d0db364fac827e03c33e88b6ab3094a268b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/298135
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: dan sinclair <dsinclair@chromium.org>

generator/templates/api.h

diff --git a/generator/templates/api.h b/generator/templates/api.h
index 56a7fce..71ab2cb 100644
--- a/generator/templates/api.h
+++ b/generator/templates/api.h
@@ -242,7 +242,7 @@
 typedef uint64_t {{API}}Flags;
 typedef uint32_t {{API}}Bool;
 
-{% for type in by_category["object"] %}
+{% for type in by_category["object"] | sort %}
     typedef struct {{as_cType(type.name)}}Impl* {{as_cType(type.name)}} {{API}}_OBJECT_ATTRIBUTE;
 {% endfor %}
 

third_party/webgpu-headers/webgpu.h.diff

diff --git a/third_party/webgpu-headers/webgpu.h.diff b/third_party/webgpu-headers/webgpu.h.diff
index 2a55300..c4f81b2 100644
--- a/third_party/webgpu-headers/webgpu.h.diff
+++ b/third_party/webgpu-headers/webgpu.h.diff
@@ -1,17 +1,8 @@
 --- webgpu_header
 +++ dawn_header
 @@
--typedef struct WGPUComputePassEncoderImpl* WGPUComputePassEncoder WGPU_OBJECT_ATTRIBUTE;
-@@
 -typedef struct WGPUExternalTextureImpl* WGPUExternalTexture WGPU_OBJECT_ATTRIBUTE;
 @@
--typedef struct WGPURenderBundleEncoderImpl* WGPURenderBundleEncoder WGPU_OBJECT_ATTRIBUTE;
--typedef struct WGPURenderPassEncoderImpl* WGPURenderPassEncoder WGPU_OBJECT_ATTRIBUTE;
-@@
-+typedef struct WGPUComputePassEncoderImpl* WGPUComputePassEncoder WGPU_OBJECT_ATTRIBUTE;
-+typedef struct WGPURenderBundleEncoderImpl* WGPURenderBundleEncoder WGPU_OBJECT_ATTRIBUTE;
-+typedef struct WGPURenderPassEncoderImpl* WGPURenderPassEncoder WGPU_OBJECT_ATTRIBUTE;
-@@
 +struct WGPUBindGroupEntry;
 @@
 -struct WGPUExternalTextureBindingEntry;