Fixing signed/unsigned char bug on ARM for TouchFactory

views/touchui/touch_factory.h

 // Copyright (c) 2011 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.
 
 #ifndef VIEWS_TOUCHUI_TOUCH_FACTORY_H_
 #define VIEWS_TOUCHUI_TOUCH_FACTORY_H_
 #pragma once
 
 #include <bitset>
 #include <vector>
@@ skipping 156 matching lines @@
   std::bitset<kMaxDeviceNum> touch_device_lookup_;
 
   // The list of touch devices.
   std::vector<int> touch_device_list_;
 
   // Index table to find the valuator for the TouchParam on the specific device
   // by valuator_lookup_[device_id][touch_params]. Use 2-D array to get fast
   // index at the expense of space. If the kMaxDeviceNum grows larger that the
   // space waste becomes a concern, the 2D lookup table can be replaced by a
   // hash map.
-  char valuator_lookup_[kMaxDeviceNum][TP_LAST_ENTRY];
+  signed char valuator_lookup_[kMaxDeviceNum][TP_LAST_ENTRY];
 
   // Index table to find the min & max value of the TouchParam on a specific
   // device.
   int touch_param_min_[kMaxDeviceNum][TP_LAST_ENTRY];
   int touch_param_max_[kMaxDeviceNum][TP_LAST_ENTRY];
 
   // Maximum simultaneous touch points.
   static const int kMaxTouchPoints = 32;
 
   // A lookup table for slots in use for a touch event.
   std::bitset<kMaxTouchPoints> slots_used_;
 
   DISALLOW_COPY_AND_ASSIGN(TouchFactory);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_TOUCHUI_TOUCH_FACTORY_H_