Change setVertexBuffers to setVertexBuffer

Following WebGPU spec change at
https://github.com/gpuweb/gpuweb/pull/468, this CL changes all
occurrences of setVertexBuffers to setVertexBuffer.

Bug: dawn:22
Change-Id: I48b551a89dc0934dfa61e661e9546a2b7eafd2fc
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/12020
Commit-Queue: François Beaufort <beaufort.francois@gmail.com>
Reviewed-by: Austin Eng <enga@chromium.org>
diff --git a/examples/ComputeBoids.cpp b/examples/ComputeBoids.cpp
index 41f2d64..4cb95f7 100644
--- a/examples/ComputeBoids.cpp
+++ b/examples/ComputeBoids.cpp
@@ -262,7 +262,6 @@
 }
 
 dawn::CommandBuffer createCommandBuffer(const dawn::Texture backbuffer, size_t i) {
-    static const uint64_t zeroOffsets[1] = {0};
     auto& bufferDst = particleBuffers[(i + 1) % 2];
     dawn::CommandEncoder encoder = device.CreateCommandEncoder();
 
@@ -278,8 +277,8 @@
         utils::ComboRenderPassDescriptor renderPass({backbuffer.CreateView()}, depthStencilView);
         dawn::RenderPassEncoder pass = encoder.BeginRenderPass(&renderPass);
         pass.SetPipeline(renderPipeline);
-        pass.SetVertexBuffers(0, 1, &bufferDst, zeroOffsets);
-        pass.SetVertexBuffers(1, 1, &modelBuffer, zeroOffsets);
+        pass.SetVertexBuffer(0, bufferDst);
+        pass.SetVertexBuffer(1, modelBuffer);
         pass.Draw(3, kNumParticles, 0, 0);
         pass.EndPass();
     }
diff --git a/examples/CppHelloTriangle.cpp b/examples/CppHelloTriangle.cpp
index c9331c1..0fd317c 100644
--- a/examples/CppHelloTriangle.cpp
+++ b/examples/CppHelloTriangle.cpp
@@ -156,13 +156,12 @@
     dawn::Texture backbuffer = swapchain.GetNextTexture();
     utils::ComboRenderPassDescriptor renderPass({backbuffer.CreateView()}, depthStencilView);
 
-    static const uint64_t vertexBufferOffsets[1] = {0};
     dawn::CommandEncoder encoder = device.CreateCommandEncoder();
     {
         dawn::RenderPassEncoder pass = encoder.BeginRenderPass(&renderPass);
         pass.SetPipeline(pipeline);
         pass.SetBindGroup(0, bindGroup);
-        pass.SetVertexBuffers(0, 1, &vertexBuffer, vertexBufferOffsets);
+        pass.SetVertexBuffer(0, vertexBuffer);
         pass.SetIndexBuffer(indexBuffer, 0);
         pass.DrawIndexed(3, 1, 0, 0, 0);
         pass.EndPass();
diff --git a/examples/CubeReflection.cpp b/examples/CubeReflection.cpp
index a6c2321..3455931 100644
--- a/examples/CubeReflection.cpp
+++ b/examples/CubeReflection.cpp
@@ -255,7 +255,6 @@
     s.a = (s.a + 1) % 256;
     s.b += 0.01f;
     if (s.b >= 1.0f) {s.b = 0.0f;}
-    static const uint64_t vertexBufferOffsets[1] = {0};
 
     cameraData.view = glm::lookAt(
         glm::vec3(8.f * std::sin(glm::radians(s.b * 360.f)), 2.f, 8.f * std::cos(glm::radians(s.b * 360.f))),
@@ -273,18 +272,18 @@
         dawn::RenderPassEncoder pass = encoder.BeginRenderPass(&renderPass);
         pass.SetPipeline(pipeline);
         pass.SetBindGroup(0, bindGroup[0]);
-        pass.SetVertexBuffers(0, 1, &vertexBuffer, vertexBufferOffsets);
+        pass.SetVertexBuffer(0, vertexBuffer);
         pass.SetIndexBuffer(indexBuffer, 0);
         pass.DrawIndexed(36, 1, 0, 0, 0);
 
         pass.SetStencilReference(0x1);
         pass.SetPipeline(planePipeline);
         pass.SetBindGroup(0, bindGroup[0]);
-        pass.SetVertexBuffers(0, 1, &planeBuffer, vertexBufferOffsets);
+        pass.SetVertexBuffer(0, planeBuffer);
         pass.DrawIndexed(6, 1, 0, 0, 0);
 
         pass.SetPipeline(reflectionPipeline);
-        pass.SetVertexBuffers(0, 1, &vertexBuffer, vertexBufferOffsets);
+        pass.SetVertexBuffer(0, vertexBuffer);
         pass.SetBindGroup(0, bindGroup[1]);
         pass.DrawIndexed(36, 1, 0, 0, 0);