Add an ASSERT about cross-world wrapper leakage into ScriptValue

Source/core/inspector/InjectedScriptBase.cpp

Index: Source/core/inspector/InjectedScriptBase.cpp
diff --git a/Source/core/inspector/InjectedScriptBase.cpp b/Source/core/inspector/InjectedScriptBase.cpp
index e3bbb3109d3952d3750cc8ecc56b475818c7c5fd..af20da9aa9be42df7882d3799c2634a77565aeb2 100644
--- a/Source/core/inspector/InjectedScriptBase.cpp
+++ b/Source/core/inspector/InjectedScriptBase.cpp
@@ -64,6 +64,7 @@ void InjectedScriptBase::initialize(ScriptValue injectedScriptObject, InspectedS
 
 bool InjectedScriptBase::canAccessInspectedWindow() const
 {
+    ASSERT(!isEmpty());
     return m_inspectedStateAccessCheck(m_injectedScriptObject.scriptState());
 }
 
@@ -74,6 +75,7 @@ const ScriptValue& InjectedScriptBase::injectedScriptObject() const
 
 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());