Fixed all unused-variable Clang warnings on Windows.

ui/base/win/atl_module.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 UI_BASE_WIN_ATL_MODULE_H_
 #define UI_BASE_WIN_ATL_MODULE_H_
 
 #include <atlbase.h>
 #include <atlcom.h>
 
@@ skipping 10 matching lines @@
 // worrying about which side of a module boundary each ATL module object
 // belongs on.
 //
 // This function must be implemented in this header file rather than a
 // source file so that it's inlined into the module where it's included,
 // rather than in the "ui" module.
 static void CreateATLModuleIfNeeded() {
   if (_pAtlModule == NULL) {
     // This creates the module and automatically updates _pAtlModule.
     CR_DEFINE_STATIC_LOCAL(CComModule, module, ());
+    static_cast<void>(module);  // Suppress unused variable warnings.

[Nico, 2015/07/02 17:34:26]

ALLOW_UNUSED_LOCAL(module);

[Matt Giuca, 2015/07/03 03:46:29]

Done.

   }
 }
 
 }  // namespace win
 }  // namespace ui
 
 #endif  // UI_BASE_WIN_ATL_MODULE_H_