Misc. cleanup, primarily removing unused locals.

components/crash/tools/crash_service.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 "components/crash/tools/crash_service.h"
 
 #include <windows.h>
 
 #include <sddl.h>
 #include <fstream>
@@ skipping 74 matching lines @@
 // This is the main and only application window.
 HWND g_top_window = NULL;
 
 bool CreateTopWindow(HINSTANCE instance, bool visible) {
   WNDCLASSEXW wcx = {0};
   wcx.cbSize = sizeof(wcx);
   wcx.style = CS_HREDRAW | CS_VREDRAW;
   wcx.lpfnWndProc = CrashSvcWndProc;
   wcx.hInstance = instance;
   wcx.lpszClassName = L"crash_svc_class";
-  ATOM atom = ::RegisterClassExW(&wcx);
+  ::RegisterClassExW(&wcx);
   DWORD style = visible ? WS_POPUPWINDOW | WS_VISIBLE : WS_OVERLAPPED;
 
   // The window size is zero but being a popup window still shows in the
   // task bar and can be closed using the system menu or using task manager.
   HWND window = CreateWindowExW(0, wcx.lpszClassName, L"crash service", style,
                                 CW_USEDEFAULT, CW_USEDEFAULT, 0, 0,
                                 NULL, NULL, instance, NULL);
   if (!window)
     return false;
 
@@ skipping 353 matching lines @@
           << "\ndumps serviced :" << requests_handled_
           << "\ndumps reported :" << requests_sent_;
 
   return static_cast<int>(msg.wParam);
 }
 
 PSECURITY_DESCRIPTOR CrashService::GetSecurityDescriptorForLowIntegrity() {
   // Build the SDDL string for the label.
   std::wstring sddl = L"S:(ML;;NW;;;S-1-16-4096)";
 
-  DWORD error = ERROR_SUCCESS;
   PSECURITY_DESCRIPTOR sec_desc = NULL;
 
   PACL sacl = NULL;
   BOOL sacl_present = FALSE;
   BOOL sacl_defaulted = FALSE;
 
   if (::ConvertStringSecurityDescriptorToSecurityDescriptorW(sddl.c_str(),
                                                              SDDL_REVISION,
                                                              &sec_desc, NULL)) {
     if (::GetSecurityDescriptorSacl(sec_desc, &sacl_present, &sacl,
                                     &sacl_defaulted)) {
       return sec_desc;
     }
   }
 
   return NULL;
 }
 
 }  // namespace breakpad