Impelement InputDevice.firesTouchEvents

Source/core/events/InputDevice.idl

Index: Source/core/events/InputDevice.idl
diff --git a/Source/core/events/InputDevice.idl b/Source/core/events/InputDevice.idl
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+// 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.
+
+// Represents an input device (or group of related devices).

[tdresser, 2015/05/27 12:38:47]

Can we expand on what we mean by "related"? Is our only guarantee that devices
with different properties will be separate InputDevices?

[lanwei, 2015/05/28 14:56:18]

Done.

+// To ease implementation, developers cannot rely on comparing two InputDevice
+// instances for equality.  Eg. two mice with the same properties in a system may
+// appear as a single InputDevice instance.
+[
+    Constructor(optional InputDeviceInit deviceInitDict)
+] interface InputDevice {
+    
+    // Whether this device dispatches touch events for movement.  This is used to detect
+    // mouse events which represent only an action that has already been handled  by
+    // touch event handlers.
+    readonly attribute boolean firesTouchEvents;
+};