Remove all remaining traces of MessageLoopProxy.

content/browser/service_worker/service_worker_browsertest.cc

 // Copyright 2014 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 <stdint.h>
 
 #include <map>
 #include <memory>
 #include <utility>
@@ skipping 1671 matching lines @@
       int* result,
       const base::Closure& continuation,
       std::unique_ptr<CacheStorageCacheHandle> cache_handle,
       CacheStorageError error,
       std::unique_ptr<ServiceWorkerResponse> response,
       std::unique_ptr<storage::BlobDataHandle> blob_data_handle) {
     ASSERT_EQ(CACHE_STORAGE_OK, error);
     blob_data_handle_ = std::move(blob_data_handle);
     blob_reader_ = blob_data_handle_->CreateReader(
         file_system_context_,
-        BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE).get());
+        BrowserThread::GetTaskRunnerForThread(BrowserThread::FILE).get());
     const storage::BlobReader::Status status = blob_reader_->CalculateSize(
         base::Bind(&self::OnBlobReaderCalculateSizeCallback, this, result,
                    continuation));
 
     ASSERT_NE(storage::BlobReader::Status::NET_ERROR, status);
     if (status == storage::BlobReader::Status::DONE)
       OnBlobReaderCalculateSizeCallback(result, continuation, net::OK);
   }
 
   void OnBlobReaderCalculateSizeCallback(int* result,
@@ skipping 192 matching lines @@
  private:
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerV8CacheStrategiesAggressiveTest);
 };
 
 IN_PROC_BROWSER_TEST_F(ServiceWorkerV8CacheStrategiesAggressiveTest,
                        V8CacheOnCacheStorage) {
   CheckStrategyIsAggressive();
 }
 
 }  // namespace content