Add a TODO to clean up libgcrypt & gnutls dependency.

printing/backend/print_backend_cups.cc

 // Copyright (c) 2012 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.
 
 #include "printing/backend/print_backend.h"
 
 #include "build/build_config.h"
 
 #include <dlfcn.h>
 #include <errno.h>
@@ skipping 24 matching lines @@
 
 namespace {
 
 // Init GCrypt library (needed for CUPS) using pthreads.
 // There exists a bug in CUPS library, where it crashed with: "ath.c:184:
 // _gcry_ath_mutex_lock: Assertion `*lock == ((ath_mutex_t) 0)' failed."
 // It happened when multiple threads tried printing simultaneously.
 // Google search for 'gnutls thread safety' provided a solution that
 // initialized gcrypt and gnutls.
 
+// TODO(phajdan.jr): Remove this after https://bugs.g10code.com/gnupg/issue1197
+// gets fixed on all Linux distros we support (i.e. when they ship libgcrypt
+// with the fix).
+
 // Initially, we linked with -lgnutls and simply called gnutls_global_init(),
 // but this did not work well since we build one binary on Ubuntu Hardy and
 // expect it to run on many Linux distros. (See http://crbug.com/46954)
 // So instead we use dlopen() and dlsym() to dynamically load and call
 // gnutls_global_init().
 
 class GcryptInitializer {
  public:
   GcryptInitializer() {
     Init();
@@ skipping 311 matching lines @@
                    << ", HTTP error: " << http_error;
         file_util::Delete(ppd_path, false);
         ppd_path.clear();
       }
     }
   }
   return ppd_path;
 }
 
 }  // namespace printing