Flip the true/false result of ScriptState::contextIsValid

Source/core/inspector/PageRuntimeAgent.cpp

 /*
  * Copyright (C) 2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 152 matching lines @@
             addExecutionContextToFrontend(isolatedContexts[i].first, false, isolatedContexts[i].second->toRawString(), frameId);
         isolatedContexts.clear();
     }
 }
 
 void PageRuntimeAgent::frameWindowDiscarded(LocalDOMWindow* window)
 {
     Vector<RefPtr<ScriptState> > scriptStatesToRemove;
     for (ScriptStateToId::iterator it = m_scriptStateToId.begin(); it != m_scriptStateToId.end(); ++it) {
         RefPtr<ScriptState> scriptState = it->key;
-        if (scriptState->contextIsValid() || window == scriptState->domWindow()) {
+        if (!scriptState->contextIsValid() || window == scriptState->domWindow()) {
             scriptStatesToRemove.append(scriptState);
             m_frontend->executionContextDestroyed(it->value);
         }
     }
     m_scriptStateToId.removeAll(scriptStatesToRemove);
     injectedScriptManager()->discardInjectedScriptsFor(window);
 }
 
 } // namespace blink