Revert of Mojo EDK: Introduce MojoQueryHandleSignalsState API

mojo/public/cpp/system/handle_signals_state.h

Index: mojo/public/cpp/system/handle_signals_state.h
diff --git a/mojo/public/cpp/system/handle_signals_state.h b/mojo/public/cpp/system/handle_signals_state.h
deleted file mode 100644
index 9e2430f15a56f01066fb36e94f75814deaf2a833..0000000000000000000000000000000000000000
--- a/mojo/public/cpp/system/handle_signals_state.h
+++ /dev/null
@@ -1,83 +0,0 @@
-// Copyright 2017 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_PUBLIC_CPP_SYSTEM_HANDLE_SIGNALS_STATE_H_
-#define MOJO_PUBLIC_CPP_SYSTEM_HANDLE_SIGNALS_STATE_H_
-
-#include "mojo/public/c/system/types.h"
-#include "mojo/public/cpp/system/system_export.h"
-
-namespace mojo {
-
-// A convenience wrapper around the MojoHandleSignalsState struct.
-struct MOJO_CPP_SYSTEM_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 operator==(const HandleSignalsState& other) const {
-    return satisfied_signals == other.satisfied_signals &&
-           satisfiable_signals == other.satisfiable_signals;
-  }
-
-  // TODO(rockot): Remove this in favor of operator==.
-  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);
-  }
-
-  // The handle is currently readable. May apply to a message pipe handle or
-  // data pipe consumer handle.
-  bool readable() const { return satisfies(MOJO_HANDLE_SIGNAL_READABLE); }
-
-  // The handle is currently writable. May apply to a message pipe handle or
-  // data pipe producer handle.
-  bool writable() const { return satisfies(MOJO_HANDLE_SIGNAL_WRITABLE); }
-
-  // The handle's peer is closed. May apply to any message pipe or data pipe
-  // handle.
-  bool peer_closed() const { return satisfies(MOJO_HANDLE_SIGNAL_PEER_CLOSED); }
-
-  // The handle will never be |readable()| again.
-  bool never_readable() const {
-    return !can_satisfy(MOJO_HANDLE_SIGNAL_READABLE);
-  }
-
-  // The handle will never be |writable()| again.
-  bool never_writable() const {
-    return !can_satisfy(MOJO_HANDLE_SIGNAL_WRITABLE);
-  }
-
-  // The handle can never indicate |peer_closed()|. Never true for message pipe
-  // or data pipe handles (they can always signal peer closure), but always true
-  // for other types of handles (they have no peer.)
-  bool never_peer_closed() const {
-    return !can_satisfy(MOJO_HANDLE_SIGNAL_PEER_CLOSED);
-  }
-
-  // (Copy and assignment allowed.)
-};
-
-static_assert(sizeof(HandleSignalsState) == sizeof(MojoHandleSignalsState),
-              "HandleSignalsState should add no overhead");
-
-}  // namespace mojo
-
-#endif  // MOJO_PUBLIC_CPP_SYSTEM_HANDLE_SIGNALS_STATE_H_