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

base/strings/string_util_win.h

Index: base/strings/string_util_win.h
diff --git a/base/strings/string_util_win.h b/base/strings/string_util_win.h
index 7c1e34cf8fcff95c592119dedf7977eae07a6476..839a799a157f0cff6202064518a1700e8112dbfc 100644
--- a/base/strings/string_util_win.h
+++ b/base/strings/string_util_win.h
@@ -20,14 +20,6 @@ inline char* strdup(const char* str) {
   return _strdup(str);
 }
 
-inline int strcasecmp(const char* s1, const char* s2) {
-  return _stricmp(s1, s2);
-}
-
-inline int strncasecmp(const char* s1, const char* s2, size_t count) {
-  return _strnicmp(s1, s2, count);
-}
-
 inline int vsnprintf(char* buffer, size_t size,
                      const char* format, va_list arguments) {
   int length = vsnprintf_s(buffer, size, size - 1, format, arguments);