Enable MSVC warning for unused locals.

chrome/browser/enumerate_modules_model_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 "chrome/browser/enumerate_modules_model_win.h"
 
 #include <Tlhelp32.h>
 #include <wintrust.h>
 #include <algorithm>
 
@@ skipping 961 matching lines @@
 }
 
 EnumerateModulesModel::~EnumerateModulesModel() {
   delete lock;
 }
 
 void EnumerateModulesModel::MaybePostScanningTask() {
   static bool done = false;
   if (!done) {
     done = true;
-
-    const CommandLine& cmd_line = *CommandLine::ForCurrentProcess();
     if (base::win::GetVersion() == base::win::VERSION_XP) {
       check_modules_timer_.Start(FROM_HERE,
           base::TimeDelta::FromMilliseconds(kModuleCheckDelayMs),
           this, &EnumerateModulesModel::ScanNow);
     }
   }
 }
 
 void EnumerateModulesModel::DoneScanning() {
   confirmed_bad_modules_detected_ = 0;
@@ skipping 43 matching lines @@
   GenerateHash(base::WideToUTF8(module.location), &location);
   GenerateHash(base::WideToUTF8(module.description), &description);
   GenerateHash(base::WideToUTF8(module.digital_signer), &signer);
 
   base::string16 url =
       l10n_util::GetStringFUTF16(IDS_HELP_CENTER_VIEW_CONFLICTS,
           base::ASCIIToUTF16(filename), base::ASCIIToUTF16(location),
           base::ASCIIToUTF16(description), base::ASCIIToUTF16(signer));
   return GURL(base::UTF16ToUTF8(url));
 }