Attempt to fix a CloseHandle crasher in the renderer process. The crash is triggered by Nacl.

components/nacl/renderer/plugin/plugin.h

 // -*- c++ -*-
 // 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.
 
 // The portable representation of an instance and root scriptable object.
 // The PPAPI version of the plugin instantiates a subclass of this class.
 
 #ifndef COMPONENTS_NACL_RENDERER_PLUGIN_PLUGIN_H_
 #define COMPONENTS_NACL_RENDERER_PLUGIN_PLUGIN_H_
@@ skipping 62 matching lines @@
   // event handlers should block until the module is ready before
   // trying to communicate with it, i.e., until nacl_ready_state is
   // DONE.
   //
   // NB: currently we do not time out, so if the untrusted code
   // does not signal that it is ready, then we will deadlock the main
   // thread of the renderer on this subsequent event delivery.  We
   // should include a time-out at which point we declare the
   // nacl_ready_state to be done, and let the normal crash detection
   // mechanism(s) take over.
+  // Please note that a call to this function takes over ownership of the
+  // file_info pointer.
   void LoadNaClModule(PP_NaClFileInfo file_info,
                       bool uses_nonsfi_mode,
                       PP_NaClAppProcessType process_type);
 
   // Load support.
   // A helper SRPC NaCl module can be loaded given a PP_NaClFileInfo.
   // Blocks until the helper module signals initialization is done.
   // Does not update nacl_module_origin().
   // Returns NULL or the NaClSubprocess of the new helper NaCl module.
+  // Please note that a call to this function takes over ownership of the
+  // file_info pointer.
   NaClSubprocess* LoadHelperNaClModule(const std::string& helper_url,
                                        PP_NaClFileInfo file_info,
                                        ErrorInfo* error_info);
 
   // Report an error that was encountered while loading a module.
   void ReportLoadError(const ErrorInfo& error_info);
 
   nacl::DescWrapperFactory* wrapper_factory() const { return wrapper_factory_; }
 
   const PPB_NaCl_Private* nacl_interface() const { return nacl_interface_; }
@@ skipping 68 matching lines @@
 
   PP_NaClFileInfo nexe_file_info_;
 
   const PPB_NaCl_Private* nacl_interface_;
   pp::UMAPrivate uma_interface_;
 };
 
 }  // namespace plugin
 
 #endif  // COMPONENTS_NACL_RENDERER_PLUGIN_PLUGIN_H_