Add tangentialPressure and twist properties to PointerEvent on Mac

content/browser/renderer_host/input/web_input_event_builders_mac.mm

 // 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.
 
 /*
  * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2006-2009 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ skipping 329 matching lines @@
 
   // Set stylus properties for events with a subtype of
   // NSTabletPointEventSubtype.
   result.pointerType = blink::WebPointerProperties::PointerType::Pen;
   result.id = [event deviceID];
   if (subtype == NSTabletPointEventSubtype) {
     result.force = [event pressure];
     NSPoint tilt = [event tilt];
     result.tiltX = lround(tilt.x * 90);
     result.tiltY = lround(tilt.y * 90);
+    result.tangentialPressure = [event tangentialPressure];
+    result.twist = [event rotation];

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

The NSEvent spec doesn't specify the range at all, so we have to be careful
here:
https://developer.apple.com/reference/appkit/nsevent/1526249-rotation

Let's clamp NSEvent.rotation values within [0,360), including for negative
values.

Curious: did you see [0,359] in practice?

[lanwei, 2017/01/05 16:13:40]

Done. Yes, the value I saw is in this range.

   }
   return result;
 }
 
 // WebMouseWheelEvent ---------------------------------------------------------
 
 blink::WebMouseWheelEvent WebMouseWheelEventBuilder::Build(
     NSEvent* event,
     NSView* view) {
   blink::WebMouseWheelEvent result;
@@ skipping 182 matching lines @@
       break;
     default:
       NOTIMPLEMENTED();
       result.type = blink::WebInputEvent::Undefined;
   }
 
   return result;
 }
 
 }  // namespace content