Add InputEvent and EventPacket types for batched input delivery

content/common/input/input_event_type.h

Index: content/common/input/input_event_type.h
diff --git a/content/common/input/input_event_type.h b/content/common/input/input_event_type.h
new file mode 100644
index 0000000000000000000000000000000000000000..8e91c74b7d5782e3d0c5fed856124995df86dd66
--- /dev/null
+++ b/content/common/input/input_event_type.h
@@ -0,0 +1,21 @@
+// 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_TYPE_H_
+#define CONTENT_COMMON_INPUT_INPUT_EVENT_TYPE_H_
+
+namespace content {
+
+// Type of input event passed between the browser and renderer, in increasingly
+// restrictive order.
+enum InputEventType {
+  INPUT_EVENT_INVALID,
+  INPUT_EVENT_ONE_WAY,
+  INPUT_EVENT_NEEDS_ACK,
+  INPUT_EVENT_NEEDS_ACK_AND_HAS_FOLLOWUP
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_INPUT_INPUT_EVENT_TYPE_H_