Change device IDs from unsigned to signed.

ui/ozone/platform/egltest/ozone_platform_egltest.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/ozone/platform/egltest/ozone_platform_egltest.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/environment.h"
 #include "base/files/file_path.h"
@@ skipping 38 matching lines @@
   if (env->GetVar(kEglplatformShim, &library))
     return library;
   return kEglplatformShimDefault;
 }
 
 // Touch events are reported in device coordinates. This scales the event to the
 // window's coordinate space.
 void ScaleTouchEvent(TouchEvent* event, const gfx::SizeF& size) {
   for (const auto& device :
        DeviceDataManager::GetInstance()->touchscreen_devices()) {
-    if (device.id == static_cast<unsigned int>(event->source_device_id())) {
+    if (device.id == event->source_device_id()) {
       gfx::SizeF touchscreen_size = device.size;
       gfx::PointF location = event->location_f();
 
       location.Scale(size.width() / touchscreen_size.width(),
                      size.height() / touchscreen_size.height());
       double ratio = std::sqrt(size.GetArea() / touchscreen_size.GetArea());
 
       event->set_location(location);
       event->set_radius_x(event->radius_x() * ratio);
       event->set_radius_y(event->radius_y() * ratio);
@@ skipping 324 matching lines @@
 
 }  // namespace
 
 OzonePlatform* CreateOzonePlatformEgltest() {
   OzonePlatformEgltest* platform = new OzonePlatformEgltest;
   platform->Initialize();
   return platform;
 }
 
 }  // namespace ui