Remove all remaining traces of MessageLoopProxy.

chrome/browser/chromeos/extensions/external_cache_unittest.cc

 // Copyright 2013 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 "chrome/browser/chromeos/extensions/external_cache.h"
 
 #include <map>
 #include <set>
 #include <string>
 #include <utility>
@@ skipping 44 matching lines @@
     return request_context_getter_.get();
   }
 
   const base::DictionaryValue* provided_prefs() {
     return prefs_.get();
   }
 
   // testing::Test overrides:
   void SetUp() override {
     request_context_getter_ = new net::TestURLRequestContextGetter(
-        content::BrowserThread::GetMessageLoopProxyForThread(
+        content::BrowserThread::GetTaskRunnerForThread(
             content::BrowserThread::IO));
     fetcher_factory_.reset(new net::TestURLFetcherFactory());
 
     pool_owner_.reset(
         new base::SequencedWorkerPoolOwner(3, "Background Pool"));
     background_task_runner_ = pool_owner_->pool()->GetSequencedTaskRunner(
         pool_owner_->pool()->GetNamedSequenceToken("background"));
   }
 
   // ExternalCache::Delegate:
@@ skipping 225 matching lines @@
   ASSERT_TRUE(provided_prefs()->GetDictionary(kTestExtensionId1, &entry1));
   EXPECT_TRUE(entry1->HasKey(
       extensions::ExternalProviderImpl::kExternalUpdateUrl));
   EXPECT_FALSE(entry1->HasKey(
       extensions::ExternalProviderImpl::kExternalCrx));
   EXPECT_FALSE(entry1->HasKey(
       extensions::ExternalProviderImpl::kExternalVersion));
 }
 
 }  // namespace chromeos