Add InputEvent and EventPacket types for batched input delivery

content/common/input/input_event_state.h

+// 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_COMMON_INPUT_INPUT_EVENT_STATE_H_
+#define CONTENT_COMMON_INPUT_INPUT_EVENT_STATE_H_
+
+namespace content {
+
+// State of input events as they are handled and passed between the browser and
+// renderer.
+enum InputEventState {
+  INPUT_EVENT_UNHANDLED,
+
+  INPUT_EVENT_IMPL_THREAD_ABSORBED,
+  INPUT_EVENT_IMPL_THREAD_NO_CONSUMER_EXISTS,
+  INPUT_EVENT_IMPL_THREAD_BOUNCE_TO_MAIN,
+  INPUT_EVENT_IMPL_THREAD_COULD_NOT_DELIVER,
+
+  INPUT_EVENT_MAIN_THREAD_ABSORBED,
+  INPUT_EVENT_MAIN_THREAD_PREVENT_DEFAULTED,
+  INPUT_EVENT_MAIN_THREAD_NOT_PREVENT_DEFAULTED,
+  INPUT_EVENT_MAIN_THREAD_NO_HANDLER_EXISTS,
+  INPUT_EVENT_MAIN_THREAD_COULD_NOT_DELIVER,
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_INPUT_INPUT_EVENT_STATE_H_