Add the defaults for Draw and DrawIndexed

And updates all places in tests and examples where they could have been
used.

Bug: dawn:22
Change-Id: Ic36e3f1810037b5addeb9e971b1da28fdd1da183
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/18380
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
diff --git a/src/tests/end2end/ClipSpaceTests.cpp b/src/tests/end2end/ClipSpaceTests.cpp
index 856a5ae..77f503e 100644
--- a/src/tests/end2end/ClipSpaceTests.cpp
+++ b/src/tests/end2end/ClipSpaceTests.cpp
@@ -89,7 +89,7 @@
     wgpu::CommandEncoder commandEncoder = device.CreateCommandEncoder();
     wgpu::RenderPassEncoder renderPass = commandEncoder.BeginRenderPass(&renderPassDescriptor);
     renderPass.SetPipeline(CreatePipelineForTest());
-    renderPass.Draw(6, 1, 0, 0);
+    renderPass.Draw(6);
     renderPass.EndPass();
     wgpu::CommandBuffer commandBuffer = commandEncoder.Finish();
     wgpu::Queue queue = device.CreateQueue();