Adds Mojo IDL.

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

Index: third_party/WebKit/Source/core/mojo/Mojo.h
diff --git a/third_party/WebKit/Source/core/mojo/Mojo.h b/third_party/WebKit/Source/core/mojo/Mojo.h
new file mode 100644
index 0000000000000000000000000000000000000000..c841b28710f90dcf2e64c3fb90e1a029f3aa991d
--- /dev/null
+++ b/third_party/WebKit/Source/core/mojo/Mojo.h
@@ -0,0 +1,52 @@
+// 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 Mojo_h
+#define Mojo_h
+
+#include "bindings/core/v8/ScriptWrappable.h"
+#include "mojo/public/cpp/system/core.h"
+
+namespace blink {
+
+class MojoCreateMessagePipeResult;
+
+class Mojo final : public GarbageCollected<Mojo>, public ScriptWrappable {
+  DEFINE_WRAPPERTYPEINFO();
+
+ public:
+  CORE_EXPORT static Mojo* create();
+
+  // MojoResult
+  static const MojoResult kResultOk = MOJO_HANDLE_SIGNAL_NONE;

[yzshen1, 2017/01/12 23:38:35]

Why having these constant definitions? They don't seem to be used anywhere?
Besides, assigning MOJO_HANDLE_SIGNAL_NONE to kResultOk is probably wrong.

[alokp, 2017/01/13 01:07:55]

These are defined to keep the values of various error codes defined in Mojo.idl
in sync with that in Mojo C API. MOJO_HANDLE_SIGNAL_NONE is a typo, which has
been fixed in the new patch.

+  static const MojoResult kResultCancelled = MOJO_RESULT_CANCELLED;
+  static const MojoResult kResultUnknown = MOJO_RESULT_UNKNOWN;
+  static const MojoResult kResultInvalidArgument = MOJO_RESULT_INVALID_ARGUMENT;
+  static const MojoResult kResultDeadlineExceeded =
+      MOJO_RESULT_DEADLINE_EXCEEDED;
+  static const MojoResult kResultNotFound = MOJO_RESULT_NOT_FOUND;
+  static const MojoResult kResultAlreadyExists = MOJO_RESULT_ALREADY_EXISTS;
+  static const MojoResult kResultPermissionDenied =
+      MOJO_RESULT_PERMISSION_DENIED;
+  static const MojoResult kResultResourceExhausted =
+      MOJO_RESULT_RESOURCE_EXHAUSTED;
+  static const MojoResult kResultFailedPrecondition =
+      MOJO_RESULT_FAILED_PRECONDITION;
+  static const MojoResult kResultAborted = MOJO_RESULT_ABORTED;
+  static const MojoResult kResultOutOfRange = MOJO_RESULT_OUT_OF_RANGE;
+  static const MojoResult kResultUnimplemented = MOJO_RESULT_UNIMPLEMENTED;
+  static const MojoResult kResultInternal = MOJO_RESULT_INTERNAL;
+  static const MojoResult kResultUnavailable = MOJO_RESULT_UNAVAILABLE;
+  static const MojoResult kResultDataLoss = MOJO_RESULT_DATA_LOSS;
+  static const MojoResult kResultBusy = MOJO_RESULT_BUSY;
+  static const MojoResult kResultShouldWait = MOJO_RESULT_SHOULD_WAIT;
+
+  void createMessagePipe(MojoCreateMessagePipeResult&);
+
+  DEFINE_INLINE_TRACE() {}
+};
+
+}  // namespace blink
+
+#endif  // Mojo_h