Reduce unnecessary usage of TextCaseSensitivity::TextCaseInsensitive.

third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp

Index: third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp
diff --git a/third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp b/third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp
index b24a79d5e87aa69051e59fa16543b3cf678fb9e1..a5e0f7125e574477ff0e9a7ae99f74b87aa91144 100644
--- a/third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp
+++ b/third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp
@@ -578,8 +578,8 @@ static bool isLibxmlDefaultCatalogFile(const String& urlString) {
     return true;
 
   // On Windows, libxml computes a URL relative to where its DLL resides.
-  if (urlString.startsWith("file:///", TextCaseInsensitive) &&
-      urlString.endsWith("/etc/catalog", TextCaseInsensitive))
+  if (urlString.startsWith("file:///", TextCaseASCIIInsensitive) &&
+      urlString.endsWith("/etc/catalog", TextCaseASCIIInsensitive))
     return true;
   return false;
 }
@@ -594,12 +594,13 @@ static bool shouldAllowExternalLoad(const KURL& url) {
 
   // The most common DTD. There isn't much point in hammering www.w3c.org by
   // requesting this URL for every XHTML document.
-  if (urlString.startsWith("http://www.w3.org/TR/xhtml", TextCaseInsensitive))
+  if (urlString.startsWith("http://www.w3.org/TR/xhtml",
+                           TextCaseASCIIInsensitive))
     return false;
 
   // Similarly, there isn't much point in requesting the SVG DTD.
   if (urlString.startsWith("http://www.w3.org/Graphics/SVG",
-                           TextCaseInsensitive))
+                           TextCaseASCIIInsensitive))
     return false;
 
   // The libxml doesn't give us a lot of context for deciding whether to allow