Revert of UTF-8 detector for pages missing encoding info

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

Index: third_party/WebKit/Source/wtf/text/UTF8.cpp
diff --git a/third_party/WebKit/Source/wtf/text/UTF8.cpp b/third_party/WebKit/Source/wtf/text/UTF8.cpp
index a258db81b99a483309b80078de146aed8053d9c3..0beca10497c8e8411d13883305a172c28b264b45 100644
--- a/third_party/WebKit/Source/wtf/text/UTF8.cpp
+++ b/third_party/WebKit/Source/wtf/text/UTF8.cpp
@@ -442,23 +442,5 @@
     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