Verify the order of RawResourceClient callbacks in DocumentThreadableLoader

third_party/WebKit/Source/core/loader/DocumentThreadableLoader.h

 /*
  * Copyright (C) 2009, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013, Intel Corporation
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 143 matching lines @@
         // DocumentThreadableLoader was ready. When DocumentThreadableLoader
         // moves onto the oilpan heap, make it a ResourceOwner again and remove
         // this re-implementation of ResourceOwner.
         RawResource* resource() const { return m_resource.get(); }
         void clearResource() { setResource(nullptr); }
         void setResource(RawResource* newResource)
         {
             if (newResource == m_resource)
                 return;
 
-            if (RawResource* oldResource = m_resource.release())
+            if (RawResource* oldResource = m_resource.release()) {
+                m_checker.willRemoveClient();
                 oldResource->removeClient(this);
+            }
 
             if (newResource) {
                 m_resource = newResource;
+                m_checker.willAddClient();
                 m_resource->addClient(this);
             }
         }
         Persistent<RawResource> m_resource;
         // End of ResourceOwner re-implementation, see above.
 
         SecurityOrigin* getSecurityOrigin() const;
         Document& document() const;
 
         ThreadableLoaderClient* m_client;
@@ skipping 39 matching lines @@
 
         // Max number of times that this DocumentThreadableLoader can follow
         // cross-origin redirects.
         // This is used to limit the number of redirects.
         // But this value is not the max number of total redirects allowed,
         // because same-origin redirects are not counted here.
         int m_corsRedirectLimit;
 
         WebURLRequest::FetchRedirectMode m_redirectMode;
 
+        RawResourceClientStateChecker m_checker;
+
         WeakPtrFactory<DocumentThreadableLoader> m_weakFactory;
     };
 
 } // namespace blink
 
 #endif // DocumentThreadableLoader_h