Reduce/remove usage of BrowserThread in content/browser/loader.

content/browser/loader/resource_dispatcher_host_unittest.cc

 // 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.
 
 #include <stddef.h>
 
 #include <memory>
 #include <utility>
 #include <vector>
 
@@ skipping 830 matching lines @@
 }
 
 class ResourceDispatcherHostTest : public testing::Test, public IPC::Sender {
  public:
   typedef ResourceDispatcherHostImpl::LoadInfo LoadInfo;
   typedef ResourceDispatcherHostImpl::LoadInfoList LoadInfoList;
   typedef ResourceDispatcherHostImpl::LoadInfoMap LoadInfoMap;
 
   ResourceDispatcherHostTest()
       : thread_bundle_(content::TestBrowserThreadBundle::IO_MAINLOOP),
-        host_(base::Bind(&DownloadResourceHandler::Create)),
+        host_(base::Bind(&DownloadResourceHandler::Create),
+              base::ThreadTaskRunnerHandle::Get(),
+              base::ThreadTaskRunnerHandle::Get()),
         use_test_ssl_certificate_(false),
         send_data_received_acks_(false),
         auto_advance_(false) {
     host_.SetLoaderDelegate(&loader_delegate_);
     browser_context_.reset(new TestBrowserContext());
     BrowserContext::EnsureResourceContextInitialized(browser_context_.get());
     base::RunLoop().RunUntilIdle();
     filter_ = MakeForwardingFilter();
     // TODO(cbentzel): Better way to get URLRequestContext?
     net::URLRequestContext* request_context =
         browser_context_->GetResourceContext()->GetRequestContext();
     job_factory_.reset(new TestURLRequestJobFactory(this));
     request_context->set_job_factory(job_factory_.get());
     request_context->set_network_delegate(&network_delegate_);
   }
 
   ~ResourceDispatcherHostTest() override {
     filter_->OnChannelClosing();
+    filter_ = nullptr;
+    web_contents_filter_ = nullptr;
   }
 
   // IPC::Sender implementation
   bool Send(IPC::Message* msg) override {
     accum_.AddMessage(*msg);
 
     if (send_data_received_acks_ &&
         msg->type() == ResourceMsg_DataReceived::ID) {
       GenerateDataReceivedACK(*msg);
     }
@@ skipping 3044 matching lines @@
   return nullptr;
 }
 
 net::URLRequestJob* TestURLRequestJobFactory::MaybeInterceptResponse(
     net::URLRequest* request,
     net::NetworkDelegate* network_delegate) const {
   return nullptr;
 }
 
 }  // namespace content