Remove dead code: net::ResetNSSHttpIOForTesting

Unused since f0747fdc.

Change-Id: Ibe0d24c416107f754bf3e835fd1a63000a37a42d
Reviewed-on: https://chromium-review.googlesource.com/964983Reviewed-by: Eric Roman <eroman@chromium.org>
Commit-Queue: Matt Mueller <mattm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#544076}

net/cert_net/nss_ocsp.cc

@@ -90,23 +90,6 @@ class OCSPIOLoop {
   void AddRequest(OCSPRequestSession* request);
   void RemoveRequest(OCSPRequestSession* request);
 
-  // Clears internal state and calls |StartUsing()|. Should be called only in
-  // the context of testing.
-  void ReuseForTesting() {
-    {
-      base::AutoLock autolock(lock_);
-      DCHECK(base::MessageLoopForIO::current());
-      thread_checker_.DetachFromThread();
-
-      // CalledOnValidThread is the only available API to reassociate
-      // thread_checker_ with the current thread. Result ignored intentionally.
-      ignore_result(thread_checker_.CalledOnValidThread());
-      shutdown_ = false;
-      used_ = false;
-    }
-    StartUsing();
-  }
-
  private:
   friend struct base::LazyInstanceTraitsBase<OCSPIOLoop>;
 
@@ -881,10 +864,6 @@ void ShutdownNSSHttpIO() {
   g_ocsp_io_loop.Get().Shutdown();
 }
 
-void ResetNSSHttpIOForTesting() {
-  g_ocsp_io_loop.Get().ReuseForTesting();
-}
-
 // This function would be called before NSS initialization.
 void SetURLRequestContextForNSSHttpIO(URLRequestContext* request_context) {
   pthread_mutex_lock(&g_request_context_lock);

net/cert_net/nss_ocsp.h

@@ -26,10 +26,6 @@ NET_EXPORT void EnsureNSSHttpIOInit();
 // related HTTP fetches.
 NET_EXPORT void ShutdownNSSHttpIO();
 
-// Can be called after a call to |ShutdownNSSHttpIO()| to reset internal state
-// and associate it with the current thread.
-NET_EXPORT void ResetNSSHttpIOForTesting();
-
 // Sets the URLRequestContext for HTTP requests issued by NSS.
 NET_EXPORT void SetURLRequestContextForNSSHttpIO(
     URLRequestContext* request_context);