Fix ResourceSchedulingFilter crash after ResourceDispatcher deleted

content/child/resource_dispatcher.h

 // 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.
 
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #ifndef CONTENT_CHILD_RESOURCE_DISPATCHER_H_
 #define CONTENT_CHILD_RESOURCE_DISPATCHER_H_
 
 #include <stdint.h>
@@ skipping 128 matching lines @@
   }
 
   void SetMainThreadTaskRunner(
       scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner) {
     main_thread_task_runner_ = main_thread_task_runner;
   }
 
   void SetResourceSchedulingFilter(
       scoped_refptr<ResourceSchedulingFilter> resource_scheduling_filter);
 
+  base::WeakPtr<ResourceDispatcher> GetWeakPtr() {
+    return weak_factory_.GetWeakPtr();
+  }
+
  private:
   friend class URLResponseBodyConsumer;
   friend class ResourceDispatcherTest;
 
   typedef std::deque<IPC::Message*> MessageQueue;
   struct PendingRequestInfo {
     PendingRequestInfo(std::unique_ptr<RequestPeer> peer,
                        ResourceType resource_type,
                        int origin_pid,
                        const GURL& frame_origin,
@@ skipping 117 matching lines @@
   scoped_refptr<ResourceSchedulingFilter> resource_scheduling_filter_;
 
   base::WeakPtrFactory<ResourceDispatcher> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceDispatcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_RESOURCE_DISPATCHER_H_