Revert of Completed webkit radiusX, radiusY and rotationAngle handling.

content/browser/renderer_host/input/web_input_event_util.cc

Index: content/browser/renderer_host/input/web_input_event_util.cc
diff --git a/content/browser/renderer_host/input/web_input_event_util.cc b/content/browser/renderer_host/input/web_input_event_util.cc
index 0d5ef0c0ad260c66332ef32dcf8806aabf199fd9..303a8d0844c86fa99f345dc34908ac808d600193 100644
--- a/content/browser/renderer_host/input/web_input_event_util.cc
+++ b/content/browser/renderer_host/input/web_input_event_util.cc
@@ -2,12 +2,7 @@
 // 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/strings/string_util.h"
 #include "content/common/input/web_touch_event_traits.h"
@@ -193,41 +188,7 @@
   touch.position.y = event.GetY(pointer_index);
   touch.screenPosition.x = event.GetRawX(pointer_index);
   touch.screenPosition.y = event.GetRawY(pointer_index);
-
-  // A note on touch ellipse specifications:
-  //
-  // Android MotionEvent provides the major and minor axes of the touch ellipse,
-  // as well as the orientation of the major axis clockwise from vertical, in
-  // radians. See:
-  // http://developer.android.com/reference/android/view/MotionEvent.html
-  //
-  // The proposed extension to W3C Touch Events specifies the touch ellipse
-  // using two radii along x- & y-axes and a positive acute rotation angle in
-  // degrees. See:
-  // http://dvcs.w3.org/hg/webevents/raw-file/default/touchevents.html
-
-  float major_radius = event.GetTouchMajor(pointer_index) / 2.f;
-  float minor_radius = event.GetTouchMinor(pointer_index) / 2.f;
-  float orientation_deg = event.GetOrientation(pointer_index) * 180.f / M_PI;
-  DCHECK_GE(major_radius, 0) << "Unexpected touch major < 0";
-  DCHECK_GE(minor_radius, 0) << "Unexpected touch minor < 0";
-  DCHECK_GE(major_radius, minor_radius) << "Unexpected major/minor touch radii";
-  DCHECK(-90 <= orientation_deg && orientation_deg <= 90)
-      << "Unexpected touch orientation angle";
-  if (orientation_deg >= 0) {
-    // The case orientation_deg == 0 is handled here on purpose: although the
-    // 'else' block is equivalent in this case, we want to pass the 0 value
-    // unchanged (and 0 is the default value for many devices that don't
-    // 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;
-  }
-
+  touch.radiusX = touch.radiusY = event.GetTouchMajor(pointer_index) * 0.5f;
   touch.force = event.GetPressure(pointer_index);
 
   return touch;