DevTools: clear pending script to evaluate on load upon page agent being disabled

Source/core/inspector/InspectorPageAgent.cpp

Index: Source/core/inspector/InspectorPageAgent.cpp
diff --git a/Source/core/inspector/InspectorPageAgent.cpp b/Source/core/inspector/InspectorPageAgent.cpp
index 1858ef4c973259847183241f5b99f73d31c2cdd4..43f38868215b024550cfff802268349847f842d8 100644
--- a/Source/core/inspector/InspectorPageAgent.cpp
+++ b/Source/core/inspector/InspectorPageAgent.cpp
@@ -427,6 +427,8 @@ void InspectorPageAgent::disable(ErrorString*)
     m_enabled = false;
     m_state->setBoolean(PageAgentState::pageAgentEnabled, false);
     m_state->remove(PageAgentState::pageAgentScriptsToEvaluateOnLoad);
+    m_scriptToEvaluateOnLoadOnce = String();
+    m_pendingScriptToEvaluateOnLoadOnce = String();
     m_instrumentingAgents->setInspectorPageAgent(0);
     if (m_inspectorResourceContentLoader) {
         m_inspectorResourceContentLoader->dispose();