Remove ContextLifecycleObserer from XHRReplayData

third_party/WebKit/Source/core/inspector/InspectorNetworkAgent.cpp

Index: third_party/WebKit/Source/core/inspector/InspectorNetworkAgent.cpp
diff --git a/third_party/WebKit/Source/core/inspector/InspectorNetworkAgent.cpp b/third_party/WebKit/Source/core/inspector/InspectorNetworkAgent.cpp
index 89b751538085166dd2f2f59339d20e06ed896149..6a4fb950adc483ec9953fdcde644b081ff27d3bb 100644
--- a/third_party/WebKit/Source/core/inspector/InspectorNetworkAgent.cpp
+++ b/third_party/WebKit/Source/core/inspector/InspectorNetworkAgent.cpp
@@ -1311,7 +1311,7 @@ Response InspectorNetworkAgent::replayXHR(const String& requestId) {
     return Response::Error("Given id does not correspond to XHR");
 
   ExecutionContext* executionContext = xhrReplayData->getExecutionContext();
-  if (!executionContext) {
+  if (executionContext->isContextDestroyed()) {
     m_resourcesData->setXHRReplayData(requestId, 0);
     return Response::Error("Document is already detached");
   }