Make some ScriptValue references const in modules/indexeddb

Source/modules/indexeddb/IDBCursor.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 68 matching lines @@
 
 void IDBCursor::trace(Visitor* visitor)
 {
     visitor->trace(m_request);
     visitor->trace(m_source);
     visitor->trace(m_transaction);
     visitor->trace(m_key);
     visitor->trace(m_primaryKey);
 }
 
-IDBRequest* IDBCursor::update(ScriptState* scriptState, ScriptValue& value, ExceptionState& exceptionState)
+IDBRequest* IDBCursor::update(ScriptState* scriptState, const ScriptValue& value, ExceptionState& exceptionState)
 {
     IDB_TRACE("IDBCursor::update");
 
     if (!m_gotValue) {
         exceptionState.throwDOMException(InvalidStateError, IDBDatabase::noValueErrorMessage);
         return 0;
     }
     if (isKeyCursor()) {
         exceptionState.throwDOMException(InvalidStateError, IDBDatabase::isKeyCursorErrorMessage);
         return 0;
@@ skipping 287 matching lines @@
     case WebIDBCursorDirectionPrevNoDuplicate:
         return IndexedDBNames::prevunique;
 
     default:
         ASSERT_NOT_REACHED();
         return IndexedDBNames::next;
     }
 }
 
 } // namespace blink