Revert of [DevTools] Show sync XHR info during request loading.

Source/core/inspector/InspectorResourceAgent.h

Index: Source/core/inspector/InspectorResourceAgent.h
diff --git a/Source/core/inspector/InspectorResourceAgent.h b/Source/core/inspector/InspectorResourceAgent.h
index 06dd33541240c0688866f71f3868374a3d4fba5e..a97776d275fa088e962dca4b72bbbf10579c39db 100644
--- a/Source/core/inspector/InspectorResourceAgent.h
+++ b/Source/core/inspector/InspectorResourceAgent.h
@@ -162,8 +162,8 @@
     // Stores the data for replaying XHR until an identifier for the load is
     // generated by the loader and passed to the inspector via the
     // documentThreadableLoaderStartedLoadingForClient() method.
-    ThreadableLoaderClient* m_pendingXHR;
-    RefPtrWillBeMember<XHRReplayData> m_pendingXHRReplayData;
+    typedef WillBeHeapHashMap<ThreadableLoaderClient*, RefPtrWillBeMember<XHRReplayData> > PendingXHRReplayDataMap;
+    PendingXHRReplayDataMap m_pendingXHRReplayData;
 
     // Stores the pointer to the ThreadableLoaderClient for an EventSource
     // (actually, the EventSource instance itself) for which a loader is being