Adds Mojo IDL.

third_party/WebKit/Source/core/mojo/Mojo.cpp

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "core/mojo/Mojo.h"
+
+#include "core/mojo/MojoCreateMessagePipeResult.h"
+#include "core/mojo/MojoHandle.h"
+
+namespace blink {
+
+// static
+void Mojo::createMessagePipe(MojoCreateMessagePipeResult& resultDict) {
+  MojoCreateMessagePipeOptions options = {0};
+  options.struct_size = sizeof(::MojoCreateMessagePipeOptions);
+  options.flags = MOJO_CREATE_MESSAGE_PIPE_OPTIONS_FLAG_NONE;
+
+  mojo::ScopedMessagePipeHandle handle0, handle1;
+  MojoResult result = mojo::CreateMessagePipe(&options, &handle0, &handle1);
+
+  resultDict.setResult(result);
+  if (result == MOJO_RESULT_OK) {
+    resultDict.setHandle0(
+        MojoHandle::create(mojo::ScopedHandle::From(std::move(handle0))));
+    resultDict.setHandle1(
+        MojoHandle::create(mojo::ScopedHandle::From(std::move(handle1))));
+  }
+}
+
+}  // namespace blink