bindings: preparation for fixing incorrect dependency of SerializedScriptValue.

Source/bindings/core/v8/SerializedScriptValue.h

Index: Source/bindings/core/v8/SerializedScriptValue.h
diff --git a/Source/bindings/core/v8/SerializedScriptValue.h b/Source/bindings/core/v8/SerializedScriptValue.h
index 2ebfee9b2f21d535ac685a9de6294eb1879c2553..9bd2c5dc918721af1d33cec9190935c90a718eb9 100644
--- a/Source/bindings/core/v8/SerializedScriptValue.h
+++ b/Source/bindings/core/v8/SerializedScriptValue.h
@@ -69,6 +69,10 @@ public:
 
     ~SerializedScriptValue();
 
+    // VarInt encoding constants.
+    static const int varIntShift = 7;
+    static const int varIntMask = (1 << varIntShift) - 1;
+
     // If a serialization error occurs (e.g., cyclic input value) this
     // function returns an empty representation, schedules a V8 exception to
     // be thrown using v8::ThrowException(), and sets |didThrow|. In this case