Convert ARRAYSIZE_UNSAFE -> arraysize in chrome/browser/.

chrome/browser/chromeos/fileapi/file_system_backend_unittest.cc

 // Copyright 2013 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/fileapi/file_system_backend.h"
 
 #include <set>
 
 #include "base/files/file_path.h"
 #include "base/path_service.h"
@@ skipping 240 matching lines @@
     // System mount points path more specific.
     { FPL("/m/n/o/p/r/s"), true, FPL("n/o/p/r/s") },
     // System mount points path less specific.
     { FPL("/z/y/x"), true, FPL("y/x") },
     // Only system mount points path matches.
     { FPL("/z/q/r/s"), true, FPL("gz/q/r/s") },
     // No match.
     { FPL("/foo/xxx"), false, FPL("") },
   };
 
-  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kTestCases); ++i) {
+  for (size_t i = 0; i < arraysize(kTestCases); ++i) {
     // Initialize virtual path with a value.
     base::FilePath virtual_path(FPL("/mount"));
     base::FilePath local_path(kTestCases[i].local_path);
     EXPECT_EQ(kTestCases[i].success,
               backend.GetVirtualPath(local_path, &virtual_path))
         << "Resolving " << kTestCases[i].local_path;
 
     // There are no guarantees for |virtual_path| value if |GetVirtualPath|
     // fails.
     if (!kTestCases[i].success)
       continue;
 
     base::FilePath expected_virtual_path(kTestCases[i].virtual_path);
     EXPECT_EQ(expected_virtual_path, virtual_path)
         << "Resolving " << kTestCases[i].local_path;
   }
 }
 
 }  // namespace