Populates sourceDevice attribute into TouchEvent

Source/core/input/InputDevice.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 InputDevice_h
+#define InputDevice_h
+
+#include "bindings/core/v8/ScriptWrappable.h"
+#include "core/CoreExport.h"
+#include "core/input/InputDeviceInit.h"
+#include "wtf/PassRefPtr.h"
+#include "wtf/RefCounted.h"
+
+namespace blink {
+
+class CORE_EXPORT InputDevice : public RefCountedWillBeGarbageCollectedFinalized<InputDevice>, public ScriptWrappable {
+    DEFINE_WRAPPERTYPEINFO();
+
+public:
+    ~InputDevice();
+
+    // This return a static local InputDevice pointer which has firesTouchEvents set to be true.
+    static PassRefPtrWillBeRawPtr<InputDevice> touchEventInstance();
+
+    // This return a static local InputDevice pointer which has firesTouchEvents set to be false.
+    static PassRefPtrWillBeRawPtr<InputDevice> nonTouchEventInstance();
+
+    static PassRefPtrWillBeRawPtr<InputDevice> create()
+    {
+        return adoptRefWillBeNoop(new InputDevice);
+    }
+
+    static PassRefPtrWillBeRawPtr<InputDevice> create(bool firesTouchEvents)
+    {
+        return adoptRefWillBeNoop(new InputDevice(firesTouchEvents));
+    }
+
+    static PassRefPtrWillBeRawPtr<InputDevice> create(
+        const InputDeviceInit& initializer)
+    {
+        return adoptRefWillBeNoop(new InputDevice(initializer));
+    }
+
+    bool firesTouchEvents() const { return m_firesTouchEvents; }
+    void setFiresTouchEvents(bool firesTouchEvents)
+    {
+        m_firesTouchEvents = firesTouchEvents;
+    }
+
+    DECLARE_VIRTUAL_TRACE();
+
+private:
+    InputDevice();
+    InputDevice(bool);
+    InputDevice(const InputDeviceInit&);
+
+    // Whether this device dispatches touch events. This mainly lets developers
+    // avoid handling both touch and mouse events dispatched for a single user
+    // action.
+    bool m_firesTouchEvents;
+};
+
+} // namespace blink
+
+#endif // InputDevice_h