IndexedDB: Replace IDL operation overloading with ScriptValue handling

Source/modules/indexeddb/IDBKeyRange.h

Index: Source/modules/indexeddb/IDBKeyRange.h
diff --git a/Source/modules/indexeddb/IDBKeyRange.h b/Source/modules/indexeddb/IDBKeyRange.h
index e102664cb6eefb74be81096f296bb1c86c350c5e..fe3f66970f2f187279eebaaf204d0395e7c18e32 100644
--- a/Source/modules/indexeddb/IDBKeyRange.h
+++ b/Source/modules/indexeddb/IDBKeyRange.h
@@ -52,6 +52,10 @@ public:
         return adoptRef(new IDBKeyRange(lower, upper, lowerType, upperType));
     }
     static PassRefPtr<IDBKeyRange> create(PassRefPtr<IDBKey> prpKey);
+
+    // Null if the script value is null or undefined, the range if it is one, otherwise tries to convert to a key and throws if it fails.
+    static PassRefPtr<IDBKeyRange> fromScriptValue(ScriptExecutionContext*, const ScriptValue&, ExceptionState&);
+
     ~IDBKeyRange() { }
 
     // Implement the IDBKeyRange IDL