Revert of UTF-8 detector for pages missing encoding info

third_party/WebKit/Source/wtf/text/UTF8.cpp

 /*
  * Copyright (C) 2007 Apple Inc.  All rights reserved.
  * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 424 matching lines @@
 bool equalUTF16WithUTF8(const UChar* a, const UChar* aEnd, const char* b, const char* bEnd)
 {
     return equalWithUTF8Internal(a, aEnd, b, bEnd);
 }
 
 bool equalLatin1WithUTF8(const LChar* a, const LChar* aEnd, const char* b, const char* bEnd)
 {
     return equalWithUTF8Internal(a, aEnd, b, bEnd);
 }
 
-bool isUTF8andNotASCII(const char* data, size_t length)
-{
-    // This cast is necessary because U8_NEXT uses int32_ts.
-    int32_t srcLen = static_cast<int32_t>(length);
-    int32_t charIndex = 0;
-    bool isASCIIOnly = true;
-
-    while (charIndex < srcLen) {
-        int32_t codePoint;
-        if (static_cast<uint8_t>(data[charIndex]) >= 0x80)
-            isASCIIOnly = false;
-        U8_NEXT(data, charIndex, srcLen, codePoint);
-        if (!U_IS_UNICODE_CHAR(codePoint))
-            return false;
-    }
-    return !isASCIIOnly;
-}
-
 } // namespace Unicode
 } // namespace WTF