Cleanly detach XHR and other pending loader clients from Inspector.

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 2aab6c337a23b6a80b2a8073bb909f474969d67f..1d780d3479ae9b74bbffd664b642cabbeca3f8a6 100644
--- a/third_party/WebKit/Source/core/inspector/InspectorNetworkAgent.cpp
+++ b/third_party/WebKit/Source/core/inspector/InspectorNetworkAgent.cpp
@@ -1040,6 +1040,17 @@ void InspectorNetworkAgent::didFinishEventSourceRequest(
   clearPendingRequestData();
 }
 
+void InspectorNetworkAgent::detachClientRequest(

[yhirano, 2017/01/25 11:06:26]

ditto

+    ThreadableLoaderClient* client) {
+  if (m_pendingRequest == client) {
+    m_pendingRequest = nullptr;
+    if (m_pendingRequestType == InspectorPageAgent::XHRResource) {
+      m_pendingXHRReplayData.clear();
+    }
+  }
+  m_knownRequestIdMap.remove(client);
+}
+
 void InspectorNetworkAgent::applyUserAgentOverride(String* userAgent) {
   String userAgentOverride;
   m_state->getString(NetworkAgentState::userAgentOverride, &userAgentOverride);