Adds Mojo IDL.

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

+// Copyright 2016 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 "bindings/core/v8/V8MojoHandle.h"
+
+namespace blink {
+
+MojoResult Mojo::close(MojoHandle* handle) {
+  LOG(INFO) << __FUNCTION__;
+  return handle->close();
+}
+
+bool Mojo::isHandle(const ScriptValue& value) {
+  LOG(INFO) << __FUNCTION__;
+  return true;
+
+  if (value.isEmpty()) {
+    LOG(INFO) << __FUNCTION__ << "Empty handle.";
+    return false;
+  }
+
+  return !!V8MojoHandle::toImplWithTypeCheck(value.isolate(), value.v8Value());
+}
+
+}  // namespace blink