Invalidate WeakPtrs of ResourceMessageFilter on channel shutdown

content/browser/loader/async_revalidation_manager_unittest.cc

 // Copyright 2015 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 "content/browser/loader/async_revalidation_manager.h"
 
 #include <deque>
 #include <string>
 #include <utility>
 
@@ skipping 271 matching lines @@
     request_context->set_job_factory(job_factory_.get());
     request_context->set_network_delegate(network_delegate_.get());
     host_.EnableStaleWhileRevalidateForTesting();
   }
 
   AsyncRevalidationManagerTest()
       : AsyncRevalidationManagerTest(
             base::WrapUnique(new net::TestNetworkDelegate)) {}
 
   void TearDown() override {
+    filter_->OnChannelClosing();
     host_.CancelRequestsForProcess(filter_->child_id());
     host_.Shutdown();
     host_.CancelRequestsForContext(browser_context_->GetResourceContext());
     browser_context_.reset();
     base::RunLoop().RunUntilIdle();
   }
 
   void SetResponse(const std::string& headers, const std::string& data) {
     job_factory_->SetResponse(headers, data);
   }
@@ skipping 247 matching lines @@
   // already completed.
   EXPECT_TRUE(NextRequestWasDestroyed());
 
   // But no others.
   EXPECT_TRUE(IsEmpty());
 }
 
 }  // namespace
 
 }  // namespace content