Merge 96999 - Make isXMLMIMEType regex use TLS

Source/WebCore/dom/DOMImplementation.cpp

Index: Source/WebCore/dom/DOMImplementation.cpp
===================================================================
--- Source/WebCore/dom/DOMImplementation.cpp	(revision 97019)
+++ Source/WebCore/dom/DOMImplementation.cpp	(working copy)
@@ -48,6 +48,7 @@
 #include "RegularExpression.h"
 #include "Settings.h"
 #include "TextDocument.h"
+#include "ThreadGlobalData.h"
 #include "XMLNames.h"
 #include <wtf/StdLibExtras.h>
 
@@ -272,13 +273,27 @@
     return sheet.release();
 }
 
+static const char* const validXMLMIMETypeChars = "[0-9a-zA-Z_\\-+~!$\\^{}|.%'`#&*]"; // per RFCs: 3023, 2045
+
+XMLMIMETypeRegExp::XMLMIMETypeRegExp() :
+    m_regex(adoptPtr(new RegularExpression(WTF::makeString("^", validXMLMIMETypeChars, "+/", validXMLMIMETypeChars, "+\\+xml$"), TextCaseSensitive)))
+{
+}
+
+XMLMIMETypeRegExp::~XMLMIMETypeRegExp()
+{
+}
+
+bool XMLMIMETypeRegExp::isXMLMIMEType(const String& mimeType)
+{
+    return m_regex->match(mimeType) > -1;
+}
+
 bool DOMImplementation::isXMLMIMEType(const String& mimeType)
 {
     if (mimeType == "text/xml" || mimeType == "application/xml" || mimeType == "text/xsl")
         return true;
-    static const char* const validChars = "[0-9a-zA-Z_\\-+~!$\\^{}|.%'`#&*]"; // per RFCs: 3023, 2045
-    DEFINE_STATIC_LOCAL(RegularExpression, xmlTypeRegExp, (String("^") + validChars + "+/" + validChars + "+\\+xml$", TextCaseSensitive));
-    return xmlTypeRegExp.match(mimeType) > -1;
+    return threadGlobalData().xmlTypeRegExp().isXMLMIMEType(mimeType);
 }
 
 bool DOMImplementation::isTextMIMEType(const String& mimeType)