Reduce unnecessary usage of TextCaseSensitivity::TextCaseInsensitive.

third_party/WebKit/Source/platform/network/HTTPParsers.cpp

 /*
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. http://www.torchmobile.com/
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2011 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
@@ skipping 313 matching lines @@
     bool ok;
     delay = refresh.left(pos).stripWhiteSpace().toDouble(&ok);
     if (!ok)
       return false;
 
     skipWhiteSpace(refresh, pos, matcher);
     if (pos < len && (refresh[pos] == ',' || refresh[pos] == ';'))
       ++pos;
     skipWhiteSpace(refresh, pos, matcher);
     unsigned urlStartPos = pos;
-    if (refresh.find("url", urlStartPos, TextCaseInsensitive) == urlStartPos) {
+    if (refresh.find("url", urlStartPos, TextCaseASCIIInsensitive) ==
+        urlStartPos) {
       urlStartPos += 3;
       skipWhiteSpace(refresh, urlStartPos, matcher);
       if (refresh[urlStartPos] == '=') {
         ++urlStartPos;
         skipWhiteSpace(refresh, urlStartPos, matcher);
       } else {
         urlStartPos = pos;  // e.g. "Refresh: 0; url.html"
       }
     }
 
@@ skipping 79 matching lines @@
                             unsigned& charsetPos,
                             unsigned& charsetLen,
                             unsigned start) {
   charsetPos = start;
   charsetLen = 0;
 
   size_t pos = start;
   unsigned length = mediaType.length();
 
   while (pos < length) {
-    pos = mediaType.find("charset", pos, TextCaseInsensitive);
+    pos = mediaType.find("charset", pos, TextCaseASCIIInsensitive);
     if (pos == kNotFound || !pos) {
       charsetLen = 0;
       return;
     }
 
     // is what we found a beginning of a word?
     if (mediaType[pos - 1] > ' ' && mediaType[pos - 1] != ';') {
       pos += 7;
       continue;
     }
@@ skipping 456 matching lines @@
 std::unique_ptr<JSONArray> parseJSONHeader(const String& header) {
   StringBuilder sb;
   sb.append("[");
   sb.append(header);
   sb.append("]");
   std::unique_ptr<JSONValue> headerValue = parseJSON(sb.toString());
   return JSONArray::from(std::move(headerValue));
 }
 
 }  // namespace blink