Revert "content: Remove use of MessageLoopProxy and deprecated MessageLoop APIs"

content/browser/fileapi/file_system_usage_cache_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 "storage/browser/fileapi/file_system_usage_cache.h"
 
 #include "base/basictypes.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/message_loop/message_loop.h"
-#include "base/thread_task_runner_handle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using storage::FileSystemUsageCache;
 
 namespace content {
 
 class FileSystemUsageCacheTest : public testing::Test {
  public:
   FileSystemUsageCacheTest()
-      : usage_cache_(base::ThreadTaskRunnerHandle::Get().get()) {}
+      : usage_cache_(base::MessageLoopProxy::current().get()) {}
 
   void SetUp() override { ASSERT_TRUE(data_dir_.CreateUniqueTempDir()); }
 
  protected:
   base::FilePath GetUsageFilePath() {
     return data_dir_.path().Append(FileSystemUsageCache::kUsageFileName);
   }
 
   FileSystemUsageCache* usage_cache() {
     return &usage_cache_;
@@ skipping 118 matching lines @@
   base::FilePath usage_file_path = GetUsageFilePath();
   EXPECT_FALSE(usage_cache()->IncrementDirty(usage_file_path));
 }
 
 TEST_F(FileSystemUsageCacheTest, DecrementDirtyWithoutCacheFileTest) {
   base::FilePath usage_file_path = GetUsageFilePath();
   EXPECT_FALSE(usage_cache()->IncrementDirty(usage_file_path));
 }
 
 }  // namespace content