Move some interfaces from content/port to internal content since they're not referenced in content/…

content/port/common/input_event_ack_state.h

Index: content/port/common/input_event_ack_state.h
===================================================================
--- content/port/common/input_event_ack_state.h	(revision 268187)
+++ content/port/common/input_event_ack_state.h	(working copy)
@@ -1,22 +0,0 @@
-// Copyright (c) 2012 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 CONTENT_PORT_COMMON_INPUT_EVENT_ACK_STATE_H_
-#define CONTENT_PORT_COMMON_INPUT_EVENT_ACK_STATE_H_
-
-namespace content {
-
-// Describes the state of the input event ACK coming back to the browser side.
-enum InputEventAckState {
-  INPUT_EVENT_ACK_STATE_UNKNOWN,
-  INPUT_EVENT_ACK_STATE_CONSUMED,
-  INPUT_EVENT_ACK_STATE_NOT_CONSUMED,
-  INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS,
-  INPUT_EVENT_ACK_STATE_IGNORED,
-  INPUT_EVENT_ACK_STATE_MAX = INPUT_EVENT_ACK_STATE_IGNORED
-};
-
-}  // namespace content
-
-#endif  // CONTENT_PORT_COMMON_INPUT_EVENT_ACK_STATE_H_