Adds Mojo IDL.

third_party/WebKit/Source/core/mojo/MojoScopedHandle.h

Index: third_party/WebKit/Source/core/mojo/MojoScopedHandle.h
diff --git a/third_party/WebKit/Source/core/mojo/MojoScopedHandle.h b/third_party/WebKit/Source/core/mojo/MojoScopedHandle.h
new file mode 100644
index 0000000000000000000000000000000000000000..d38c6dc268885dd13951815481766d7cc3474dd2
--- /dev/null
+++ b/third_party/WebKit/Source/core/mojo/MojoScopedHandle.h
@@ -0,0 +1,27 @@
+// 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.
+
+#ifndef MojoScopedHandle_h
+#define MojoScopedHandle_h
+
+#include "mojo/public/c/system/core.h"
+
+namespace blink {
+
+class MojoScopedHandle {

[Ken Rockot(use gerrit already), 2016/10/18 15:47:10]

Why can't you use mojo::ScopedHandle in mojo/public/cpp/system/handle.h? It
seems you're just partially duplicating that.

[alokp, 2016/10/18 16:48:37]

It would add a dependency on mojo/public/cpp, which I have tried to avoid since
it is my understanding that we cannot use base/ here? Without base/ we cannot
use mojo::Watcher for example. IMHO the things that are duplicated here do not
warrant adding the dependency on cpp.

+ public:
+  explicit MojoScopedHandle(::MojoHandle);
+  virtual ~MojoScopedHandle();
+
+  ::MojoHandle get() const { return m_handle; }
+  ::MojoHandle release();
+  MojoResult close();
+
+ private:
+  ::MojoHandle m_handle;
+};
+
+}  // namespace blink
+
+#endif  // MojoScopedHandle_h