Merge "Fix alpha value for device orientation" into jb-mr1-dev

Author: Steve Block

core/java/android/webkit/DeviceOrientationService.java

@@ -123,7 +123,7 @@ private void getOrientationUsingGetRotationMatrix() {
         // The angles are in radians
         float[] rotationAngles = new float[3];
         SensorManager.getOrientation(deviceRotationMatrix, rotationAngles);
-        double alpha = Math.toDegrees(-rotationAngles[0]) - 90.0;
+        double alpha = Math.toDegrees(-rotationAngles[0]);
         while (alpha < 0.0) { alpha += 360.0; } // [0, 360)
         double beta = Math.toDegrees(-rotationAngles[1]);
         while (beta < -180.0) { beta += 360.0; } // [-180, 180)