Enable MSVC warning for unused locals.

win8/delegate_execute/crash_server_init.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 "win8/delegate_execute/crash_server_init.h"
 
 #include <shlobj.h>
 #include <windows.h>
 
 #include <cwchar>
@@ skipping 50 matching lines @@
       entries, ARRAYSIZE(entries) };
   return &custom_info;
 }
 
 }  // namespace
 
 namespace delegate_execute {
 
 scoped_ptr<google_breakpad::ExceptionHandler> InitializeCrashReporting() {
   wchar_t temp_path[MAX_PATH + 1] = {0};
-  DWORD path_len = ::GetTempPath(MAX_PATH, temp_path);
+  ::GetTempPath(MAX_PATH, temp_path);
 
   base::string16 pipe_name;
   pipe_name = kGoogleUpdatePipeName;
   if (IsRunningSystemInstall()) {
     pipe_name += kSystemPrincipalSid;
   } else {
     base::string16 user_sid;
     if (base::win::GetUserSidString(&user_sid)) {
       pipe_name += user_sid;
     } else {
       // We don't think we're a system install, but we couldn't get the
       // user SID. Try connecting to the system-level crash service as a
       // last ditch effort.
       pipe_name += kSystemPrincipalSid;
     }
   }
 
   return scoped_ptr<google_breakpad::ExceptionHandler>(
       new google_breakpad::ExceptionHandler(
           temp_path, NULL, NULL, NULL,
           google_breakpad::ExceptionHandler::HANDLER_ALL, kLargerDumpType,
           pipe_name.c_str(), GetCustomInfo()));
 }
 
 }  // namespace delegate_execute