Pass MotionEvent tilt angles to Blink on Android.

content/browser/renderer_host/input/motion_event_web.cc

Index: content/browser/renderer_host/input/motion_event_web.cc
diff --git a/content/browser/renderer_host/input/motion_event_web.cc b/content/browser/renderer_host/input/motion_event_web.cc
index bc47cf8c17734a662dc43ad10a8662340fbed16f..daea47cf1b0068f73d6e418541ee157de9e2d3b2 100644
--- a/content/browser/renderer_host/input/motion_event_web.cc
+++ b/content/browser/renderer_host/input/motion_event_web.cc
@@ -149,6 +149,10 @@ float MotionEventWeb::GetPressure(size_t pointer_index) const {
   return 0.f;
 }
 
+float MotionEventWeb::GetTilt(size_t pointer_index) const {
+  return 0.f;

[jdduke (slow), 2015/07/31 15:00:49]

Hmm, can't we get this value from the WebTouchEvent?

[USE eero AT chromium.org, 2015/07/31 18:18:15]

Yes, although it is a bit complex. Also this member function will not be called
yet as the GetToolType member function does not return real tool type yet (but
only after https://crrev.com/1190013002/). But let's implement this now, thus
done.

+}
+
 base::TimeTicks MotionEventWeb::GetEventTime() const {
   return base::TimeTicks() +
          base::TimeDelta::FromMicroseconds(event_.timeStampSeconds *