[DevTools] Do not instrument with InspectorInspectorAgent.

Source/web/WebDevToolsAgentImpl.cpp

Index: Source/web/WebDevToolsAgentImpl.cpp
diff --git a/Source/web/WebDevToolsAgentImpl.cpp b/Source/web/WebDevToolsAgentImpl.cpp
index e224d30d0906156cecc89f804a5eb03d049c2102..a140962c27afdd0e75216b96e09be2a53ce0350a 100644
--- a/Source/web/WebDevToolsAgentImpl.cpp
+++ b/Source/web/WebDevToolsAgentImpl.cpp
@@ -282,7 +282,9 @@ WebDevToolsAgentImpl::WebDevToolsAgentImpl(
 
     InjectedScriptManager* injectedScriptManager = m_injectedScriptManager.get();
 
-    m_agents.append(InspectorInspectorAgent::create(injectedScriptManager));
+    OwnPtrWillBeRawPtr<InspectorInspectorAgent> inspectorAgentPtr(InspectorInspectorAgent::create(injectedScriptManager));
+    m_inspectorAgent = inspectorAgentPtr.get();
+    m_agents.append(inspectorAgentPtr.release());
 
     OwnPtrWillBeRawPtr<InspectorPageAgent> pageAgentPtr(InspectorPageAgent::create(page, injectedScriptManager, m_overlay));
     m_pageAgent = pageAgentPtr.get();
@@ -657,8 +659,7 @@ void WebDevToolsAgentImpl::setLayerTreeId(int layerTreeId)
 
 void WebDevToolsAgentImpl::evaluateInWebInspector(long callId, const WebString& script)
 {
-    if (InspectorInspectorAgent* inspectorAgent = m_instrumentingAgents->inspectorInspectorAgent())
-        inspectorAgent->evaluateForTestInFrontend(callId, script);
+    m_inspectorAgent->evaluateForTestInFrontend(callId, script);
 }
 
 void WebDevToolsAgentImpl::flushPendingProtocolNotifications()