Replace base::str[n]casecmp with helper functions.

base/files/file_path.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 "base/files/file_path.h"
 
 #include <string.h>
 #include <algorithm>
 
 #include "base/basictypes.h"
@@ skipping 1245 matching lines @@
 
   return HFSFastUnicodeCompare(hfs1, hfs2);
 }
 
 #else  // << WIN. MACOSX | other (POSIX) >>
 
 // Generic (POSIX) implementation of file string comparison.
 // TODO(rolandsteiner) check if this is sufficient/correct.
 int FilePath::CompareIgnoreCase(StringPieceType string1,
                                 StringPieceType string2) {
-  int comparison = strcasecmp(string1.data(), string2.data());
-  if (comparison < 0)
-    return -1;
-  if (comparison > 0)
-    return 1;
-  return 0;
+  return CompareCaseInsensitiveASCII(string1, string2);
 }
 
 #endif  // OS versions of CompareIgnoreCase()
 
 
 void FilePath::StripTrailingSeparatorsInternal() {
   // If there is no drive letter, start will be 1, which will prevent stripping
   // the leading separator if there is only one separator.  If there is a drive
   // letter, start will be set appropriately to prevent stripping the first
   // separator following the drive letter, if a separator immediately follows
@@ skipping 32 matching lines @@
 #endif
 }
 
 #if defined(OS_ANDROID)
 bool FilePath::IsContentUri() const {
   return StartsWithASCII(path_, "content://", false /*case_sensitive*/);
 }
 #endif
 
 }  // namespace base