Migrate callers of message_loop_proxy() to task_runner()

sync/internal_api/attachments/attachment_downloader_impl_unittest.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 "sync/internal_api/public/attachments/attachment_downloader_impl.h"
 
 #include "base/bind.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
@@ skipping 187 matching lines @@
   net::TestURLFetcherFactory url_fetcher_factory_;
   scoped_ptr<MockOAuth2TokenService> token_service_;
   scoped_ptr<AttachmentDownloader> attachment_downloader_;
   ResultsMap download_results_;
   int num_completed_downloads_;
   const AttachmentId attachment_id_;
 };
 
 void AttachmentDownloaderImplTest::SetUp() {
   url_request_context_getter_ =
-      new net::TestURLRequestContextGetter(message_loop_.message_loop_proxy());
+      new net::TestURLRequestContextGetter(message_loop_.task_runner());
   url_fetcher_factory_.set_remove_fetcher_on_delete(true);
   token_service_.reset(new MockOAuth2TokenService());
   token_service_->AddAccount(kAccountId);
   scoped_refptr<OAuth2TokenServiceRequest::TokenServiceProvider>
       token_service_provider(new TokenServiceProvider(token_service_.get()));
 
   OAuth2TokenService::ScopeSet scopes;
   scopes.insert(GaiaConstants::kChromeSyncOAuth2Scope);
   attachment_downloader_ = AttachmentDownloader::Create(
       GURL(kAttachmentServerUrl), url_request_context_getter_, kAccountId,
@@ skipping 309 matching lines @@
   raw += "\n";
   std::replace(raw.begin(), raw.end(), '\n', '\0');
   scoped_refptr<net::HttpResponseHeaders> headers(
       new net::HttpResponseHeaders(raw));
   uint32_t extracted;
   ASSERT_FALSE(
       AttachmentDownloaderImpl::ExtractCrc32c(headers.get(), &extracted));
 }
 
 }  // namespace syncer