Fix crash from ipc_fuzzer

printing/printing_context_system_dialog_win.cc

 // Copyright 2014 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/printing_context_system_dialog_win.h"
 
 #include "base/auto_reset.h"
 #include "base/message_loop/message_loop.h"
 #include "printing/backend/win_helper.h"
 #include "printing/print_settings_initializer_win.h"
@@ skipping 51 matching lines @@
     dialog_options.nMaxPage = max_pages;
     dialog_options.lpPageRanges = ranges;
   } else {
     // No need to bother, we don't know how many pages are available.
     dialog_options.Flags |= PD_NOPAGENUMS;
   }
 
   if (ShowPrintDialog(&dialog_options) != S_OK) {
     ResetSettings();
     callback.Run(FAILED);
+    return;
   }
 
   // TODO(maruel):  Support PD_PRINTTOFILE.
   callback.Run(ParseDialogResultEx(dialog_options));
 }
 
 HRESULT PrintingContextSytemDialogWin::ShowPrintDialog(PRINTDLGEX* options) {
   // Runs always on the UI thread.
   static bool is_dialog_shown = false;
   if (is_dialog_shown)
@@ skipping 178 matching lines @@
 
   if (dialog_options.hDevMode != NULL)
     GlobalFree(dialog_options.hDevMode);
   if (dialog_options.hDevNames != NULL)
     GlobalFree(dialog_options.hDevNames);
 
   return context() ? OK : FAILED;
 }
 
 }  // namespace printing