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

remoting/host/local_input_monitor_win.cc

 // Copyright (c) 2012 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 "remoting/host/local_input_monitor.h"
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/location.h"
 #include "base/logging.h"
@@ skipping 147 matching lines @@
 LRESULT LocalInputMonitorWin::Core::OnInput(HRAWINPUT input_handle) {
   DCHECK(ui_task_runner_->BelongsToCurrentThread());
 
   // Get the size of the input record.
   UINT size = 0;
   UINT result = GetRawInputData(input_handle,
                                 RID_INPUT,
                                 nullptr,
                                 &size,
                                 sizeof(RAWINPUTHEADER));
-  if (result == -1) {
+  if (result == static_cast<UINT>(-1)) {
     PLOG(ERROR) << "GetRawInputData() failed";
     return 0;
   }
 
   // Retrieve the input record itself.
   scoped_ptr<uint8[]> buffer(new uint8[size]);
   RAWINPUT* input = reinterpret_cast<RAWINPUT*>(buffer.get());
   result = GetRawInputData(input_handle,
                            RID_INPUT,
                            buffer.get(),
                            &size,
                            sizeof(RAWINPUTHEADER));
-  if (result == -1) {
+  if (result == static_cast<UINT>(-1)) {
     PLOG(ERROR) << "GetRawInputData() failed";
     return 0;
   }
 
   // Notify the observer about mouse events generated locally. Remote (injected)
   // mouse events do not specify a device handle (based on observed behavior).
   if (input->header.dwType == RIM_TYPEMOUSE &&
       input->header.hDevice != nullptr) {
     POINT position;
     if (!GetCursorPos(&position)) {
@@ skipping 43 matching lines @@
 scoped_ptr<LocalInputMonitor> LocalInputMonitor::Create(
     scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
     scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
     scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
     base::WeakPtr<ClientSessionControl> client_session_control) {
   return make_scoped_ptr(new LocalInputMonitorWin(
       caller_task_runner, ui_task_runner, client_session_control));
 }
 
 }  // namespace remoting