Plumb firing passive event listeners.

content/common/input/input_event_dispatch_type.h

Index: content/common/input/input_event_dispatch_type.h
diff --git a/content/common/input/input_event_dispatch_type.h b/content/common/input/input_event_dispatch_type.h
new file mode 100644
index 0000000000000000000000000000000000000000..e4acb4c1cee93f8760d801ae2dc684fcf4b43a9d
--- /dev/null
+++ b/content/common/input/input_event_dispatch_type.h
@@ -0,0 +1,18 @@
+// Copyright 2016 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_DISPATCH_TYPE_H_
+#define CONTENT_COMMON_INPUT_INPUT_EVENT_DISPATCH_TYPE_H_
+
+namespace content {
+
+enum InputEventDispatchType {
+  DISPATCH_TYPE_NORMAL,        // Dispatch a normal event.
+  DISPATCH_TYPE_NON_BLOCKING,  // Dispatch a non-blocking event.
+  DISPATCH_TYPE_MAX = DISPATCH_TYPE_NON_BLOCKING
+};
+
+}  // namespace content
+
+#endif  // CONTENT_COMMON_INPUT_INPUT_EVENT_DISPATCH_TYPE_H_