Mac Chromium style checker cleanup

chrome/app/breakpad_mac.mm

 // 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.
 
 #import "chrome/app/breakpad_mac.h"
 
 #include <CoreFoundation/CoreFoundation.h>
 #import <Foundation/Foundation.h>
 
 #include "base/auto_reset.h"
@@ skipping 112 matching lines @@
       // The entire point of this is to block so that the correct
       // stack is logged.
       base::ThreadRestrictions::ScopedAllowIO allow_io;
       base::PlatformThread::Join(handle);
     }
   }
 
  private:
   DumpHelper() {}
 
-  virtual void ThreadMain() {
+  virtual void ThreadMain() OVERRIDE {
     base::PlatformThread::SetName("CrDumpHelper");
     BreakpadGenerateAndSendReport(gBreakpadRef);
   }
 
   DISALLOW_COPY_AND_ASSIGN(DumpHelper);
 };
 
 }  // namespace
 
 bool IsCrashReporterEnabled() {
@@ skipping 148 matching lines @@
 
 #if !defined(DISABLE_NACL)
   if (process_type_switch == switches::kNaClLoaderProcess) {
     BreakpadSetFilterCallback(gBreakpadRef, NaClBreakpadCrashFilter, NULL);
   }
 #endif
 
   // Store process type in crash dump.
   SetCrashKeyValue(@"ptype", process_type);
 }