Change device IDs from unsigned to signed.

ui/events/devices/device_data_manager.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/device_data_manager.h"
 
 #include "base/at_exit.h"
 #include "base/bind.h"
 #include "base/logging.h"
 #include "ui/events/devices/input_device_event_observer.h"
@@ skipping 52 matching lines @@
 
 void DeviceDataManager::ClearTouchDeviceAssociations() {
   for (int i = 0; i < kMaxDeviceNum; i++) {
     touch_device_transformer_map_[i] = gfx::Transform();
     touch_device_to_target_display_map_[i] = gfx::Display::kInvalidDisplayID;
     touch_radius_scale_map_[i] = 1.0;
   }
 }
 
 bool DeviceDataManager::IsTouchDeviceIdValid(
-    unsigned int touch_device_id) const {
+    int touch_device_id) const {
   return (touch_device_id > 0 && touch_device_id < kMaxDeviceNum);
 }
 
 void DeviceDataManager::UpdateTouchInfoForDisplay(
     int64_t target_display_id,
-    unsigned int touch_device_id,
+    int touch_device_id,
     const gfx::Transform& touch_transformer) {
   if (IsTouchDeviceIdValid(touch_device_id)) {
     touch_device_to_target_display_map_[touch_device_id] = target_display_id;
     touch_device_transformer_map_[touch_device_id] = touch_transformer;
   }
 }
 
-void DeviceDataManager::UpdateTouchRadiusScale(unsigned int touch_device_id,
+void DeviceDataManager::UpdateTouchRadiusScale(int touch_device_id,
                                                double scale) {
   if (IsTouchDeviceIdValid(touch_device_id))
     touch_radius_scale_map_[touch_device_id] = scale;
 }
 
-void DeviceDataManager::ApplyTouchRadiusScale(unsigned int touch_device_id,
+void DeviceDataManager::ApplyTouchRadiusScale(int touch_device_id,
                                               double* radius) {
   if (IsTouchDeviceIdValid(touch_device_id))
     *radius = (*radius) * touch_radius_scale_map_[touch_device_id];
 }
 
-void DeviceDataManager::ApplyTouchTransformer(unsigned int touch_device_id,
+void DeviceDataManager::ApplyTouchTransformer(int touch_device_id,
                                               float* x,
                                               float* y) {
   if (IsTouchDeviceIdValid(touch_device_id)) {
     gfx::Point3F point(*x, *y, 0.0);
     const gfx::Transform& trans =
         touch_device_transformer_map_[touch_device_id];
     trans.TransformPoint(&point);
     *x = point.x();
     *y = point.y();
   }
 }
 
 int64_t DeviceDataManager::GetTargetDisplayForTouchDevice(
-    unsigned int touch_device_id) const {
+    int touch_device_id) const {
   if (IsTouchDeviceIdValid(touch_device_id))
     return touch_device_to_target_display_map_[touch_device_id];
   return gfx::Display::kInvalidDisplayID;
 }
 
 void DeviceDataManager::OnTouchscreenDevicesUpdated(
     const std::vector<TouchscreenDevice>& devices) {
   if (devices.size() == touchscreen_devices_.size() &&
       std::equal(devices.begin(),
                  devices.end(),
@@ skipping 54 matching lines @@
 
 void DeviceDataManager::AddObserver(InputDeviceEventObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void DeviceDataManager::RemoveObserver(InputDeviceEventObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 }  // namespace ui