touch: Make sure the correct radius values are used for touch events.

ui/base/x/events_x.cc

 // Copyright (c) 2012 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.
 
 #include "ui/base/events.h"
 
 #include <X11/Xlib.h>
 #include <X11/extensions/XInput.h>
 #include <X11/extensions/XInput2.h>
 #include <string.h>
@@ skipping 816 matching lines @@
 #else
   if (!factory->ExtractTouchParam(
          *xev, ui::TouchFactory::TP_SLOT_ID, &slot))
     LOG(ERROR) << "Could not get the slot ID for the event. Using 0.";
 #endif
   return slot;
 }
 
 float GetTouchRadiusX(const base::NativeEvent& native_event) {
   return GetTouchParamFromXEvent(native_event,
-      ui::TouchFactory::TP_TOUCH_MAJOR, 2.0) / 2.0;
+      ui::TouchFactory::TP_TOUCH_MAJOR, 0.0) / 2.0;
 }
 
 float GetTouchRadiusY(const base::NativeEvent& native_event) {
   return GetTouchParamFromXEvent(native_event,
-      ui::TouchFactory::TP_TOUCH_MINOR, 2.0) / 2.0;
+      ui::TouchFactory::TP_TOUCH_MINOR, 0.0) / 2.0;
 }
 
 float GetTouchAngle(const base::NativeEvent& native_event) {
   return GetTouchParamFromXEvent(native_event,
       ui::TouchFactory::TP_ORIENTATION, 0.0) / 2.0;
 }
 
 float GetTouchForce(const base::NativeEvent& native_event) {
   float force = 0.0;
   force = GetTouchParamFromXEvent(native_event, ui::TouchFactory::TP_PRESSURE,
@@ skipping 56 matching lines @@
     noop->xclient.format = 8;
     DCHECK(!noop->xclient.display);
   }
   // Make sure we use atom from current xdisplay, which may
   // change during the test.
   noop->xclient.message_type = GetNoopEventAtom();
   return noop;
 }
 
 }  // namespace ui