Prevent reentrant destructors in the PluginModule.

ppapi/c/private/ppb_proxy_private.h

 // Copyright (c) 2011 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.
 
 #ifndef PPAPI_C_PRIVATE_PROXY_PRIVATE_H_
 #define PPAPI_C_PRIVATE_PROXY_PRIVATE_H_
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_module.h"
 #include "ppapi/c/pp_resource.h"
 
-#define PPB_PROXY_PRIVATE_INTERFACE "PPB_Proxy_Private;4"
+#define PPB_PROXY_PRIVATE_INTERFACE "PPB_Proxy_Private;5"
 
 // Exposes functions needed by the out-of-process proxy to call into the
 // renderer PPAPI implementation.
 struct PPB_Proxy_Private {
   // Called when the given plugin process has crashed.
   void (*PluginCrashed)(PP_Module module);
 
   // Returns the instance for the given resource, or 0 on failure.
   PP_Instance (*GetInstanceForResource)(PP_Resource resource);
 
@@ skipping 13 matching lines @@
   // Returns the number of bytes synchronously readable out of the URLLoader's
   // buffer. Returns 0 on failure or if the url loader doesn't have any data
   // now.
   int32_t (*GetURLLoaderBufferedBytes)(PP_Resource url_loader);
 
   // Allows adding additional refcounts to the PluginModule that owns the
   // proxy dispatcher (and all interface proxies). For every AddRef call
   // there must be a corresponding release call.
   void (*AddRefModule)(PP_Module module);
   void (*ReleaseModule)(PP_Module module);
+
+  // Allows asserts to be written for some bad conditions while cleaning up.
+  PP_Bool (*IsInModuleDestructor)(PP_Module module);
 };
 
 #endif  // PPAPI_C_PRIVATE_PROXY_PRIVATE_H_