Add tangentialPressure and twist properties to PointerEvent on Mac

content/browser/renderer_host/input/web_input_event_builders_mac.mm

Index: content/browser/renderer_host/input/web_input_event_builders_mac.mm
diff --git a/content/browser/renderer_host/input/web_input_event_builders_mac.mm b/content/browser/renderer_host/input/web_input_event_builders_mac.mm
index 14754e24295c9131d224e65a1450fd55a8b075b9..11f434f7548f98d3bfb1ae1394551185e9a93fc9 100644
--- a/content/browser/renderer_host/input/web_input_event_builders_mac.mm
+++ b/content/browser/renderer_host/input/web_input_event_builders_mac.mm
@@ -344,6 +344,14 @@ blink::WebMouseEvent WebMouseEventBuilder::Build(NSEvent* event, NSView* view) {
     NSPoint tilt = [event tilt];
     result.tiltX = lround(tilt.x * 90);
     result.tiltY = lround(tilt.y * 90);
+    result.tangentialPressure = [event tangentialPressure];
+    // NSEvent spec doesn't specify the range of rotation, we make sure that
+    // this value is in the range of [0,359].
+    int twist = (int)[event rotation];
+    twist = twist % 360;
+    if (twist < 0)
+      twist += 360;
+    result.twist = twist;
   }
   return result;
 }