s/OutputAttachment/RenderAttachment/g

But also keep OutputAttachment so it can be gradually changed in all
dependants.

See https://github.com/gpuweb/gpuweb/pull/1168 and
https://github.com/gpuweb/gpuweb/pull/1168

Bug: dawn:22
Change-Id: I6a1ec1de6c22ca4deac88b7fffde4b98d9d54a84
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/31040
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Stephen White <senorblanco@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
diff --git a/examples/SampleUtils.cpp b/examples/SampleUtils.cpp
index f1fbb6c..cab6cb0 100644
--- a/examples/SampleUtils.cpp
+++ b/examples/SampleUtils.cpp
@@ -188,7 +188,7 @@
     descriptor.sampleCount = 1;
     descriptor.format = wgpu::TextureFormat::Depth24PlusStencil8;
     descriptor.mipLevelCount = 1;
-    descriptor.usage = wgpu::TextureUsage::OutputAttachment;
+    descriptor.usage = wgpu::TextureUsage::RenderAttachment;
     auto depthStencilTexture = device.CreateTexture(&descriptor);
     return depthStencilTexture.CreateView();
 }