Rename draw commands to match WebGPU IDL

BUG=dawn:51

Change-Id: I2a78f4e77c54aeae48d3fb78bf4701352ff40529
Reviewed-on: https://dawn-review.googlesource.com/c/3040
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
diff --git a/examples/CppHelloTriangle.cpp b/examples/CppHelloTriangle.cpp
index bf14e1a..5bd7d67 100644
--- a/examples/CppHelloTriangle.cpp
+++ b/examples/CppHelloTriangle.cpp
@@ -161,7 +161,7 @@
         pass.SetBindGroup(0, bindGroup);
         pass.SetVertexBuffers(0, 1, &vertexBuffer, vertexBufferOffsets);
         pass.SetIndexBuffer(indexBuffer, 0);
-        pass.DrawElements(3, 1, 0, 0);
+        pass.DrawIndexed(3, 1, 0, 0);
         pass.EndPass();
     }