Remove destruction-only TearDown() methods in Drive related test.

chrome/browser/chromeos/drive/resource_metadata_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 "chrome/browser/chromeos/drive/resource_metadata.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 852 matching lines @@
     ASSERT_TRUE(metadata_storage_->Initialize());
 
     resource_metadata_.reset(new ResourceMetadata(
         metadata_storage_.get(), base::MessageLoopProxy::current()));
 
     ASSERT_EQ(FILE_ERROR_OK, resource_metadata_->Initialize());
 
     SetUpEntries(resource_metadata_.get());
   }
 
-  virtual void TearDown() OVERRIDE {
-  }
-
   base::ScopedTempDir temp_dir_;
   content::TestBrowserThreadBundle thread_bundle_;
   scoped_ptr<ResourceMetadataStorage, test_util::DestroyHelperForTests>
       metadata_storage_;
   scoped_ptr<ResourceMetadata, test_util::DestroyHelperForTests>
       resource_metadata_;
 };
 
 TEST_F(ResourceMetadataTest, RefreshEntry) {
   base::FilePath drive_file_path;
@@ skipping 193 matching lines @@
     else
       ++directory_count;
   }
 
   EXPECT_EQ(7, file_count);
   EXPECT_EQ(6, directory_count);
 }
 
 }  // namespace internal
 }  // namespace drive