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/examples/CppHelloTriangle.cpp b/examples/CppHelloTriangle.cpp
index 7af1b23..ea3c6eb 100644
--- a/examples/CppHelloTriangle.cpp
+++ b/examples/CppHelloTriangle.cpp
@@ -120,7 +120,7 @@
 
     depthStencilView = CreateDefaultDepthStencilView(device);
 
-    utils::ComboRenderPipelineDescriptor2 descriptor;
+    utils::ComboRenderPipelineDescriptor descriptor;
     descriptor.layout = utils::MakeBasicPipelineLayout(device, &bgl);
     descriptor.vertex.module = vsModule;
     descriptor.vertex.bufferCount = 1;
@@ -131,7 +131,7 @@
     descriptor.cTargets[0].format = GetPreferredSwapChainTextureFormat();
     descriptor.EnableDepthStencil(wgpu::TextureFormat::Depth24PlusStencil8);
 
-    pipeline = device.CreateRenderPipeline2(&descriptor);
+    pipeline = device.CreateRenderPipeline(&descriptor);
 
     wgpu::TextureView view = texture.CreateView();