Mojo EDK: Introduce MojoQueryHandleSignalsState API

mojo/edk/system/handle_signals_state.h

 // Copyright 2014 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_EDK_SYSTEM_HANDLE_SIGNALS_STATE_H_
 #define MOJO_EDK_SYSTEM_HANDLE_SIGNALS_STATE_H_
 
-#include "mojo/edk/system/system_impl_export.h"
-#include "mojo/public/c/system/types.h"
+#include "mojo/public/cpp/system/handle_signals_state.h"
 
-namespace mojo {
-namespace edk {
-
-// Just "add" some constructors and methods to the C struct
-// |MojoHandleSignalsState| (for convenience). This should add no overhead.
-struct MOJO_SYSTEM_IMPL_EXPORT HandleSignalsState final
-    : public MojoHandleSignalsState {
-  HandleSignalsState() {
-    satisfied_signals = MOJO_HANDLE_SIGNAL_NONE;
-    satisfiable_signals = MOJO_HANDLE_SIGNAL_NONE;
-  }
-  HandleSignalsState(MojoHandleSignals satisfied,
-                     MojoHandleSignals satisfiable) {
-    satisfied_signals = satisfied;
-    satisfiable_signals = satisfiable;
-  }
-
-  bool equals(const HandleSignalsState& other) const {
-    return satisfied_signals == other.satisfied_signals &&
-           satisfiable_signals == other.satisfiable_signals;
-  }
-
-  bool satisfies(MojoHandleSignals signals) const {
-    return !!(satisfied_signals & signals);
-  }
-
-  bool can_satisfy(MojoHandleSignals signals) const {
-    return !!(satisfiable_signals & signals);
-  }
-
-  // (Copy and assignment allowed.)
-};
-static_assert(sizeof(HandleSignalsState) == sizeof(MojoHandleSignalsState),
-              "HandleSignalsState should add no overhead");
-
-}  // namespace edk
-}  // namespace mojo
+// TODO(rockot): Remove this header and use the C++ system library type
+// directly inside the EDK.
 
 #endif  // MOJO_EDK_SYSTEM_HANDLE_SIGNALS_STATE_H_