Add basic PointerEvent support in NewEventHandler

sky/engine/core/events/PointerEvent.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 SKY_ENGINE_CORE_EVENTS_POINTEREVENT_H_
 #define SKY_ENGINE_CORE_EVENTS_POINTEREVENT_H_
 
 #include "sky/engine/core/events/Event.h"
 #include "sky/engine/core/events/EventDispatchMediator.h"
 #include "sky/engine/core/frame/LocalDOMWindow.h"
@@ skipping 59 matching lines @@
     double distance() const { return m_distance; }
     double distanceMin() const { return m_distanceMin; }
     double distanceMax() const { return m_distanceMax; }
     double radiusMajor() const { return m_radiusMajor; }
     double radiusMinor() const { return m_radiusMinor; }
     double radiusMin() const { return m_radiusMin; }
     double radiusMax() const { return m_radiusMax; }
     double orientation() const { return m_orientation; }
     double tilt() const { return m_tilt; }
 
+    void setPrimary(bool primary) { m_primary = primary; }

[esprehn, 2015/01/21 02:47:51]

Does this change dynamically? What happens if two events claim they're the
primary?

[abarth-chromium, 2015/01/21 07:03:26]

Currently everything is marked as primary.  It's something that will be computed
by the EventHandler.  I can move it to the constructor if you like.
That can happen if they're being captured by different nodes.  For example, if
you have two touches on two separate scroll views, they both scroll
independently because each touch is primary for each view.  If you put a third
finger down in one of the views, it will become secondary in that view and can
be used for something else (e.g., pinching).

[abarth-chromium, 2015/01/23 02:25:09]

I removed this for now.  When we have more of this system implemented, we can
add it back.

+
 private:
     PointerEvent();
     explicit PointerEvent(const WebPointerEvent& event);
     PointerEvent(const AtomicString&, const PointerEventInit&);
 
     int m_pointer;
     String m_kind;
     double m_x;
     double m_y;
     double m_dx;
@@ skipping 12 matching lines @@
     double m_radiusMinor;
     double m_radiusMin;
     double m_radiusMax;
     double m_orientation;
     double m_tilt;
 };
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_CORE_EVENTS_POINTEREVENT_H_