Add tangentialPressure and twist properties to PointerEvent on Mac

third_party/WebKit/Source/core/events/PointerEvent.h

Index: third_party/WebKit/Source/core/events/PointerEvent.h
diff --git a/third_party/WebKit/Source/core/events/PointerEvent.h b/third_party/WebKit/Source/core/events/PointerEvent.h
index e6479485554f8142d250c04452152546c9a99f5c..38e82a5117b3c762899cfa7f79751b086b82f42f 100644
--- a/third_party/WebKit/Source/core/events/PointerEvent.h
+++ b/third_party/WebKit/Source/core/events/PointerEvent.h
@@ -26,6 +26,8 @@ class CORE_EXPORT PointerEvent final : public MouseEvent {
   float pressure() const { return m_pressure; }
   long tiltX() const { return m_tiltX; }
   long tiltY() const { return m_tiltY; }
+  float tangentialPressure() const { return m_tangentialPressure; }
+  long twist() const { return m_twist; }
   const String& pointerType() const { return m_pointerType; }
   bool isPrimary() const { return m_isPrimary; }
 
@@ -48,6 +50,8 @@ class CORE_EXPORT PointerEvent final : public MouseEvent {
   float m_pressure;
   long m_tiltX;
   long m_tiltY;
+  float m_tangentialPressure;

[dtapuska, 2017/01/03 18:32:48]

should this be a double to preserve data from javascript?

[mustaq, 2017/01/03 19:09:24]

I think this is fine because the spec specifies "float", and the WebIDL "float"
is IEEE single precision:
https://www.w3.org/TR/WebIDL/#idl-float

[lanwei, 2017/01/05 16:13:41]

Acknowledged.

+  long m_twist;
   String m_pointerType;
   bool m_isPrimary;