Fix license headers in a number of files

chrome/tools/perf/flush_cache/flush_cache.cc

-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// 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.
 
 // This little program attempts to flush the system cache for some files.
 // It's useful for testing Chrome with a cold database.
 
 #include "base/file_path.h"
 #include "base/string_piece.h"
 #include "base/process_util.h"
 #include "base/sys_string_conversions.h"
@@ skipping 11 matching lines @@
     std::wstring filename = base::SysNativeMBToWide(argv[i]);
     FilePath path = FilePath::FromWStringHack(filename);
     if (!file_util::EvictFileFromSystemCache(path)) {
       fprintf(stderr, "Failed to evict %s from cache -- is it a directory?\n",
               argv[i]);
     }
   }
 
   return 0;
 }