Adds Mojo IDL.

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

Index: third_party/WebKit/Source/core/mojo/MojoMessagePipeHandle.cpp
diff --git a/third_party/WebKit/Source/core/mojo/MojoMessagePipeHandle.cpp b/third_party/WebKit/Source/core/mojo/MojoMessagePipeHandle.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..7dc906988d3d39f3c8ab942ccc3645117119e6d9
--- /dev/null
+++ b/third_party/WebKit/Source/core/mojo/MojoMessagePipeHandle.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/MojoMessagePipeHandle.h"
+
+namespace blink {
+
+MojoMessagePipeHandle* MojoMessagePipeHandle::create(::MojoHandle handle) {
+  return new MojoMessagePipeHandle(handle);
+}
+
+MojoMessagePipeHandle::MojoMessagePipeHandle(::MojoHandle handle)
+    : MojoScopedHandle(handle) {}
+
+MojoMessagePipeHandle::~MojoMessagePipeHandle() {}
+
+}  // namespace blink