Fix stylus tools palette.

ui/events/devices/touchscreen_device.cc

 // Copyright 2014 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/events/devices/touchscreen_device.h"
 
 #include <string>
 
 #include "ui/events/devices/input_device.h"
 
 namespace ui {
 
-TouchscreenDevice::TouchscreenDevice() : touch_points(0) {
-}
+TouchscreenDevice::TouchscreenDevice() : touch_points(0), is_stylus(false) {}
 
 TouchscreenDevice::TouchscreenDevice(int id,
                                      InputDeviceType type,
                                      const std::string& name,
                                      const gfx::Size& size,
                                      int touch_points)
     : InputDevice(id, type, name),
       size(size),
       touch_points(touch_points),
       is_stylus(false) {
 }
 
 TouchscreenDevice::TouchscreenDevice(const InputDevice& input_device,
                                      const gfx::Size& size,
                                      int touch_points)
     : InputDevice(input_device),
       size(size),
       touch_points(touch_points),
       is_stylus(false) {
 }
 
+TouchscreenDevice::~TouchscreenDevice() {}
+
 }  // namespace ui