Temp experiment to confirm theory in crbug.com/5555....

net/proxy/proxy_script_fetcher.h

 // Copyright (c) 2008 The Chromium Authors. All rights reserved.  Use of this
 // source code is governed by a BSD-style license that can be found in the
 // LICENSE file.
 
 // ProxyScriptFetcher is an async interface for fetching a proxy auto config
 // script. It is specific to fetching a PAC script; enforces timeout, max-size,
 // status code.
 
 #ifndef NET_PROXY_PROXY_SCRIPT_FETCHER_H_
 #define NET_PROXY_PROXY_SCRIPT_FETCHER_H_
@@ skipping 32 matching lines @@
   // Aborts the in-progress fetch (if any).
   virtual void Cancel() = 0;
 
   // Create a ProxyScriptFetcher that uses |url_request_context|.
   static ProxyScriptFetcher* Create(URLRequestContext* url_request_context);
 
   // --------------------------------------------------------------------------
   // Testing helpers (only available to unit-tests).
   // --------------------------------------------------------------------------
  private:
-  FRIEND_TEST(ProxyScriptFetcherTest, DISABLED_Hang);
-  FRIEND_TEST(ProxyScriptFetcherTest, DISABLED_TooLarge);
+  FRIEND_TEST(ProxyScriptFetcherTest, Hang);
+  FRIEND_TEST(ProxyScriptFetcherTest, TooLarge);
 
   // Sets the maximum duration for a fetch to |timeout_ms|. Returns the previous
   // bound.
   static int SetTimeoutConstraintForUnittest(int timeout_ms);
 
   // Sets the maximum response size for a fetch to |size_bytes|. Returns the
   // previous bound.
   static size_t SetSizeConstraintForUnittest(size_t size_bytes);
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_PROXY_SCRIPT_FETCHER_H_