Switch RegularExpression from YARR to V8

Source/bindings/v8/V8PerIsolateData.h

Index: Source/bindings/v8/V8PerIsolateData.h
diff --git a/Source/bindings/v8/V8PerIsolateData.h b/Source/bindings/v8/V8PerIsolateData.h
index 10212d176eb19c1ab67e0c01a40732b87eb6c480..f9c515239f61767d3ccef6164e2d87caf3a81605 100644
--- a/Source/bindings/v8/V8PerIsolateData.h
+++ b/Source/bindings/v8/V8PerIsolateData.h
@@ -142,6 +142,8 @@ public:
 
     bool hasInstance(WrapperTypeInfo*, v8::Handle<v8::Value>, WrapperWorldType);
 
+    v8::Local<v8::Context> ensureRegexContext();
+
 private:
     explicit V8PerIsolateData(v8::Isolate*);
     ~V8PerIsolateData();
@@ -163,7 +165,7 @@ private:
 
     OwnPtr<V8HiddenPropertyName> m_hiddenPropertyName;
     ScopedPersistent<v8::Value> m_liveRoot;
-    ScopedPersistent<v8::Context> m_auxiliaryContext;
+    ScopedPersistent<v8::Context> m_regexContext;
 
     bool m_constructorMode;
     friend class ConstructorMode;