Add wheel support to sky-scrollable

sky/engine/core/events/WheelEvent.cpp

Index: sky/engine/core/events/WheelEvent.cpp
diff --git a/sky/engine/core/events/WheelEvent.cpp b/sky/engine/core/events/WheelEvent.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..9f5b032e591a85c639ce48e124fa8a467bad7e9d
--- /dev/null
+++ b/sky/engine/core/events/WheelEvent.cpp
@@ -0,0 +1,43 @@
+// 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.
+
+#include "sky/engine/config.h"
+#include "sky/engine/core/events/WheelEvent.h"
+
+namespace blink {
+
+WheelEvent::~WheelEvent()
+{
+}
+
+const AtomicString& WheelEvent::interfaceName() const
+{
+    return EventNames::WheelEvent;
+}
+
+WheelEvent::WheelEvent()
+    : WheelEvent(AtomicString(), WheelEventInit())
+{
+}
+
+WheelEvent::WheelEvent(const WebWheelEvent& event)
+    : Event(EventTypeNames::wheel, true, true)
+    , m_x(event.x)
+    , m_y(event.y)
+    , m_offsetX(event.offsetX)
+    , m_offsetY(event.offsetY)
+{
+    m_timeStamp = event.timeStampMS;
+}
+
+WheelEvent::WheelEvent(const AtomicString& type, const WheelEventInit& initializer)
+    : Event(type, initializer)
+    , m_x(initializer.x)
+    , m_y(initializer.y)
+    , m_offsetX(initializer.offsetX)
+    , m_offsetY(initializer.offsetY)
+{
+}
+
+} // namespace blink