Added experimental Touch.tilt, Touch.tiltDirection support for Android

content/browser/renderer_host/input/web_input_event_util.cc

 // Copyright 2013 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.
 
 // MSVC++ requires this to be set before any other includes to get M_PI.
 #define _USE_MATH_DEFINES
 
 #include "content/browser/renderer_host/input/web_input_event_util.h"
 
 #include <cmath>
 
+#include "base/float_util.h"
 #include "base/strings/string_util.h"
 #include "content/common/input/web_touch_event_traits.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/gesture_detection/gesture_event_data.h"
 #include "ui/events/gesture_detection/motion_event.h"
 #include "ui/gfx/geometry/safe_integer_conversions.h"
 
 using blink::WebGestureEvent;
 using blink::WebInputEvent;
 using blink::WebTouchEvent;
@@ skipping 206 matching lines @@
     // report elliptical touches).
     touch.radiusX = minor_radius;
     touch.radiusY = major_radius;
     touch.rotationAngle = orientation_deg;
   } else {
     touch.radiusX = major_radius;
     touch.radiusY = minor_radius;
     touch.rotationAngle = orientation_deg + 90;
   }
 
+  float tilt = event.GetTilt(pointer_index);
+  touch.tilt = base::IsNaN(tilt) ?
+    std::numeric_limits<float>::quiet_NaN() : (180.f / M_PI * tilt);
+
+  float tilt_direction = event.GetTiltDirection(pointer_index);
+  touch.tiltDirection = base::IsNaN(tilt_direction) ?
+    std::numeric_limits<float>::quiet_NaN() : (180.f / M_PI * tilt_direction);
+
   touch.force = event.GetPressure(pointer_index);
 
   return touch;
 }
 
 }  // namespace
 
 namespace content {
 
 void UpdateWindowsKeyCodeAndKeyIdentifier(blink::WebKeyboardEvent* event,
@@ skipping 209 matching lines @@
     flags |= ui::EF_CAPS_LOCK_DOWN;
   if (modifiers & blink::WebInputEvent::IsAutoRepeat)
     flags |= ui::EF_IS_REPEAT;
   if (modifiers & blink::WebInputEvent::IsKeyPad)
     flags |= ui::EF_NUMPAD_KEY;
 
   return flags;
 }
 
 }  // namespace content