clang/win: Let remaining chromium_code targets build with -Wextra.

device/bluetooth/bluetooth_device_win_unittest.cc

 // Copyright (c) 2013 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 "base/basictypes.h"
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/sequenced_task_runner.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/test/test_simple_task_runner.h"
@@ skipping 68 matching lines @@
  protected:
   scoped_ptr<BluetoothDeviceWin> device_;
   scoped_ptr<BluetoothTaskManagerWin::DeviceState> device_state_;
   scoped_ptr<BluetoothDeviceWin> empty_device_;
   scoped_ptr<BluetoothTaskManagerWin::DeviceState> empty_device_state_;
 };
 
 TEST_F(BluetoothDeviceWinTest, GetUUIDs) {
   BluetoothDevice::UUIDList uuids = device_->GetUUIDs();
 
-  EXPECT_EQ(2, uuids.size());
+  EXPECT_EQ(2u, uuids.size());
   EXPECT_EQ(kTestAudioSdpUuid, uuids[0]);
   EXPECT_EQ(kTestVideoSdpUuid, uuids[1]);
 
   uuids = empty_device_->GetUUIDs();
-  EXPECT_EQ(0, uuids.size());
+  EXPECT_EQ(0u, uuids.size());
 }
 
 TEST_F(BluetoothDeviceWinTest, IsEqual) {
   EXPECT_TRUE(device_->IsEqual(*device_state_));
   EXPECT_FALSE(device_->IsEqual(*empty_device_state_));
   EXPECT_FALSE(empty_device_->IsEqual(*device_state_));
   EXPECT_TRUE(empty_device_->IsEqual(*empty_device_state_));
 }
 
 }  // namespace device