Plumbing stylus tilt for 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 8ca506cfa82525c45975cdfb1eacff623b6da87e..93b89a16ce1e8037f0491b98c06934e478c39345 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
@@ -413,6 +413,9 @@ blink::WebMouseEvent WebMouseEventBuilder::Build(NSEvent* event, NSView* view) {
   }
   result.id = [event deviceID];
   result.force = [event pressure];
+  NSPoint tilt = [event tilt];
+  result.tiltX = (int) (tilt.x * 90);

[dtapuska, 2016/09/20 15:50:50]

Can we round instead of truncate?

That is what we do on other platforms.
https://cs.chromium.org/chromium/src/ui/events/blink/blink_event_util.cc?type...

[lanwei, 2016/09/20 16:12:45]

Acknowledged.

+  result.tiltY = (int) (tilt.y * 90);
   return result;
 }