Enable Clang warnings in .cc files for Linux+[Aura/ChromeOS]

chrome/browser/chromeos/system/statistics_provider.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/chromeos/system/statistics_provider.h"
 
 #include "base/bind.h"
 #include "base/chromeos/chromeos_version.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
@@ skipping 275 matching lines @@
       const CommandLine* command_line = CommandLine::ForCurrentProcess();
       if (command_line->HasSwitch(chromeos::switches::kChromeOSReleaseBoard)) {
         *result = command_line->
             GetSwitchValueASCII(chromeos::switches::kChromeOSReleaseBoard);
         return true;
       }
     }
     return false;
   }
 
-  virtual void LoadOemManifest() {
+  virtual void LoadOemManifest() OVERRIDE {
     CommandLine* command_line = CommandLine::ForCurrentProcess();
     if (!command_line->HasSwitch(switches::kAppOemManifestFile))
       return;
 
     LoadOemManifestFromFile(
         command_line->GetSwitchValuePath(switches::kAppOemManifestFile));
   }
 
   static StatisticsProviderStubImpl* GetInstance() {
     return Singleton<StatisticsProviderStubImpl,
@@ skipping 12 matching lines @@
 StatisticsProvider* StatisticsProvider::GetInstance() {
   if (base::chromeos::IsRunningOnChromeOS()) {
     return StatisticsProviderImpl::GetInstance();
   } else {
     return StatisticsProviderStubImpl::GetInstance();
   }
 }
 
 }  // namespace system
 }  // namespace chromeos