Adds Mojo IDL.

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

Index: third_party/WebKit/Source/core/mojo/MojoHandle.cpp
diff --git a/third_party/WebKit/Source/core/mojo/MojoHandle.cpp b/third_party/WebKit/Source/core/mojo/MojoHandle.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..3c281f41ff4615bbe2d96fe1c0cfbbe39fad45e4
--- /dev/null
+++ b/third_party/WebKit/Source/core/mojo/MojoHandle.cpp
@@ -0,0 +1,18 @@
+// 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/MojoHandle.h"
+
+namespace blink {
+
+MojoHandle::MojoHandle(mojo::ScopedHandle handle)
+    : m_handle(std::move(handle)) {}
+
+MojoHandle::~MojoHandle() {}
+
+MojoResult MojoHandle::close() {
+  return mojo::CloseRaw(m_handle.release());
+}
+
+}  // namespace blink