Removed deprecated CreateRenderPipeline path

Renames all the RenderPipeline*2 stuff to simple RenderPipeline* but
keeps *2 definitionas around as typedefs and wrappers so that users can
migrate away from it.

Bug: dawn:22
Change-Id: If301d81a829bba0646c3a61068f2279932b191e0
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/51764
Commit-Queue: Brandon Jones <bajones@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
diff --git a/src/tests/unittests/validation/IndexBufferValidationTests.cpp b/src/tests/unittests/validation/IndexBufferValidationTests.cpp
index fd23ce5..27f7b21 100644
--- a/src/tests/unittests/validation/IndexBufferValidationTests.cpp
+++ b/src/tests/unittests/validation/IndexBufferValidationTests.cpp
@@ -32,14 +32,14 @@
                 return vec4<f32>(0.0, 1.0, 0.0, 1.0);
             })");
 
-        utils::ComboRenderPipelineDescriptor2 descriptor;
+        utils::ComboRenderPipelineDescriptor descriptor;
         descriptor.vertex.module = vsModule;
         descriptor.cFragment.module = fsModule;
         descriptor.primitive.topology = primitiveTopology;
         descriptor.primitive.stripIndexFormat = format;
         descriptor.cTargets[0].format = wgpu::TextureFormat::RGBA8Unorm;
 
-        return device.CreateRenderPipeline2(&descriptor);
+        return device.CreateRenderPipeline(&descriptor);
     }
 };