Revert of Straightens outs DEPS in mojo/common

mojo/common/message_pump_mojo_handler.h

Index: mojo/common/message_pump_mojo_handler.h
diff --git a/mojo/common/message_pump_mojo_handler.h b/mojo/common/message_pump_mojo_handler.h
new file mode 100644
index 0000000000000000000000000000000000000000..dd136edb908897b9884f091611efa48c10b03dcd
--- /dev/null
+++ b/mojo/common/message_pump_mojo_handler.h
@@ -0,0 +1,29 @@
+// Copyright 2013 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_COMMON_MESSAGE_PUMP_MOJO_HANDLER_H_
+#define MOJO_COMMON_MESSAGE_PUMP_MOJO_HANDLER_H_
+
+#include "mojo/common/mojo_common_export.h"
+#include "third_party/mojo/src/mojo/public/cpp/system/core.h"
+
+namespace mojo {
+namespace common {
+
+// Used by MessagePumpMojo to notify when a handle is either ready or has become
+// invalid. In case of error, the handler will be removed.
+class MOJO_COMMON_EXPORT MessagePumpMojoHandler {
+ public:
+  virtual void OnHandleReady(const Handle& handle) = 0;
+
+  virtual void OnHandleError(const Handle& handle, MojoResult result) = 0;
+
+ protected:
+  virtual ~MessagePumpMojoHandler() {}
+};
+
+}  // namespace common
+}  // namespace mojo
+
+#endif  // MOJO_COMMON_MESSAGE_PUMP_MOJO_HANDLER_H_