Deprecate InputStepMode in favor of VertexStepMode

Bug: dawn:1023
Change-Id: Ib2b5f51538e25455779a303564b98b7ee4a7ab40
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/59443
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
diff --git a/src/transform/vertex_pulling.h b/src/transform/vertex_pulling.h
index a96336d..b445db7 100644
--- a/src/transform/vertex_pulling.h
+++ b/src/transform/vertex_pulling.h
@@ -63,7 +63,10 @@
 
 /// Describes if a vertex attributes increments with vertex index or instance
 /// index
-enum class InputStepMode { kVertex, kInstance, kLastEntry = kInstance };
+enum class VertexStepMode { kVertex, kInstance, kLastEntry = kInstance };
+
+/// Deprecated
+using InputStepMode = VertexStepMode;
 
 /// Describes a vertex attribute within a buffer
 struct VertexAttributeDescriptor {