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

content/browser/renderer_host/input/motion_event_android.cc

Index: content/browser/renderer_host/input/motion_event_android.cc
diff --git a/content/browser/renderer_host/input/motion_event_android.cc b/content/browser/renderer_host/input/motion_event_android.cc
index 3f18f95561b3d650ccc3b3d36bd040f6f12f587f..c152d413a0ca5189cb32e6ce608766faea652a65 100644
--- a/content/browser/renderer_host/input/motion_event_android.cc
+++ b/content/browser/renderer_host/input/motion_event_android.cc
@@ -8,11 +8,13 @@
 
 #include "base/android/jni_android.h"
 #include "base/float_util.h"
+#include "jni/MotionEventUtil_jni.h"
 #include "jni/MotionEvent_jni.h"
 #include "ui/events/event_constants.h"
 
 using base::android::AttachCurrentThread;
 using namespace JNI_MotionEvent;
+using namespace JNI_MotionEventUtil;
 
 namespace content {
 namespace {
@@ -255,6 +257,22 @@ float MotionEventAndroid::GetOrientation(size_t pointer_index) const {
       AttachCurrentThread(), event_.obj(), pointer_index));
 }
 
+float MotionEventAndroid::GetTilt(size_t pointer_index) const {
+  if (!event_.obj())
+    return std::numeric_limits<float>::quiet_NaN();
+
+  return Java_MotionEventUtil_getAxisValueOrNaN(
+      AttachCurrentThread(), event_.obj(), AXIS_TILT, pointer_index);
+}
+
+float MotionEventAndroid::GetTiltDirection(size_t pointer_index) const {
+  if (!event_.obj())
+    return std::numeric_limits<float>::quiet_NaN();
+
+  return Java_MotionEventUtil_getAxisValueOrNaN(
+      AttachCurrentThread(), event_.obj(), AXIS_ORIENTATION, pointer_index);
+}
+
 float MotionEventAndroid::GetPressure(size_t pointer_index) const {
   DCHECK_LT(pointer_index, cached_pointer_count_);
   // Note that this early return is a special case exercised only in testing, as
@@ -335,7 +353,8 @@ MotionEventAndroid::CachedPointer MotionEventAndroid::FromAndroidPointer(
 
 // static
 bool MotionEventAndroid::RegisterMotionEventAndroid(JNIEnv* env) {
-  return JNI_MotionEvent::RegisterNativesImpl(env);
+  return JNI_MotionEvent::RegisterNativesImpl(env)
+      && JNI_MotionEventUtil::RegisterNativesImpl(env);
 }
 
 }  // namespace content