Switch RegularExpression from YARR to V8

Source/core/platform/text/RegularExpression.h

Index: Source/core/platform/text/RegularExpression.h
diff --git a/Source/core/platform/text/RegularExpression.h b/Source/core/platform/text/RegularExpression.h
index 6224e742bdcfefa0128202884a47575bb3e0d426..8b99f4d2102d0d9369daf9544ed25969542fe08b 100644
--- a/Source/core/platform/text/RegularExpression.h
+++ b/Source/core/platform/text/RegularExpression.h
@@ -26,11 +26,10 @@
 #ifndef RegularExpression_h
 #define RegularExpression_h
 
-#include <wtf/BumpPointerAllocator.h>
+#include "ScopedPersistent.h"
 #include <wtf/Noncopyable.h>
-#include <wtf/PassOwnPtr.h>
 #include <wtf/text/WTFString.h>
-#include <yarr/Yarr.h>
+#include <v8.h>
 
 namespace WebCore {
 
@@ -47,11 +46,7 @@ public:
     int match(const String&, int startFrom = 0, int* matchLength = 0) const;
 
 private:
-    PassOwnPtr<JSC::Yarr::BytecodePattern> compile(const String&, TextCaseSensitivity, MultilineMode);
-
-    unsigned m_numSubpatterns;
-    OwnPtr<JSC::Yarr::BytecodePattern> m_regExpByteCode;
-    BumpPointerAllocator m_regexAllocator;
+    ScopedPersistent<v8::RegExp> m_regex;
 };
 
 void replace(String&, const RegularExpression&, const String&);