Return a enumeration of the state of handling of InputEvents.

third_party/WebKit/public/platform/WebInputEventResult.h

+// Copyright 2015 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 WebInputEventResult_h
+#define WebInputEventResult_h
+
+namespace blink {
+
+enum class WebInputEventResult {
+    // Event was not consumed by application or system.
+    NotHandled,

[dtapuska, 2015/11/24 22:10:24]

I was going to put NotHandled at the end of this list. But it made the
mergeEventResult code less simple.

+    // Event was consumed but suppressed before dispatched to application.
+    HandledSuppressed,
+    // Event was consumed by application itself; ie. a script handler calling preventDefault.
+    HandledApplication,
+    // Event was consumed by the system; ie. executing the default action.
+    HandledSystem,
+};
+
+} // namespace blink
+
+#endif // WebInputEventResult_h