Communicate whether passive event listeners exist to cc.

third_party/WebKit/public/platform/WebEventListenerProperties.h

+// Copyright 2015 The Chromium Authors. All rights reserved.

[aelias_OOO_until_Jul13, 2016/02/02 22:18:50]

nit: Copyright 2016

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef WebEventListenerProperties_h
+#define WebEventListenerProperties_h
+
+#include "WebCommon.h"
+
+namespace blink {
+
+enum class WebEventListenerClass {
+    Touch,
+    MouseWheel
+};
+
+enum class WebEventListenerProperties {
+    Nothing = 0x0, // This should be "None"; but None #defined in X11's X.h
+    Blocking = 0x1,
+    Passive = 0x2,
+};
+inline WebEventListenerProperties operator| (WebEventListenerProperties a, WebEventListenerProperties b) { return static_cast<WebEventListenerProperties>(static_cast<int32_t>(a) | static_cast<int32_t>(b)); }
+inline WebEventListenerProperties& operator|= (WebEventListenerProperties& a, WebEventListenerProperties b) { return a = a | b; }
+inline WebEventListenerProperties operator&(WebEventListenerProperties a, WebEventListenerProperties b) { return static_cast<WebEventListenerProperties>(static_cast<int32_t>(a) & static_cast<int32_t>(b)); }
+inline WebEventListenerProperties& operator&= (WebEventListenerProperties& a, WebEventListenerProperties b) { return a = a & b; }
+
+} // namespace blink
+
+#endif