Add an ASSERT about cross-world wrapper leakage into ScriptValue

Source/core/inspector/InjectedScriptBase.cpp

 /*
  * Copyright (C) 2012 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 46 matching lines @@
 }
 
 void InjectedScriptBase::initialize(ScriptValue injectedScriptObject, InspectedStateAccessCheck accessCheck)
 {
     m_injectedScriptObject = injectedScriptObject;
     m_inspectedStateAccessCheck = accessCheck;
 }
 
 bool InjectedScriptBase::canAccessInspectedWindow() const
 {
+    ASSERT(!isEmpty());
     return m_inspectedStateAccessCheck(m_injectedScriptObject.scriptState());
 }
 
 const ScriptValue& InjectedScriptBase::injectedScriptObject() const
 {
     return m_injectedScriptObject;
 }
 
 ScriptValue InjectedScriptBase::callFunctionWithEvalEnabled(ScriptFunctionCall& function, bool& hadException) const
 {
+    ASSERT(!isEmpty());
     ExecutionContext* executionContext = m_injectedScriptObject.scriptState()->executionContext();
     TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "FunctionCall", "data", InspectorFunctionCallEvent::data(executionContext, 0, name(), 1));
     TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline.stack"), "CallStack", "stack", InspectorCallStackEvent::currentCallStack());
     // FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
     InspectorInstrumentationCookie cookie = InspectorInstrumentation::willCallFunction(executionContext, 0, name(), 1);
 
     ScriptState* scriptState = m_injectedScriptObject.scriptState();
     bool evalIsDisabled = false;
     if (scriptState) {
         evalIsDisabled = !scriptState->evalEnabled();
@@ skipping 55 matching lines @@
     if (!resultObj || !resultPair->getBoolean("wasThrown", &wasThrownVal)) {
         *errorString = "Internal error: result is not a pair of value and wasThrown flag";
         return;
     }
     *objectResult = TypeBuilder::Runtime::RemoteObject::runtimeCast(resultObj);
     *wasThrown = wasThrownVal;
 }
 
 } // namespace WebCore