Remove drive::FileSystemInterface::Initialize().

chrome/browser/chromeos/drive/drive_file_stream_reader_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/drive/drive_file_stream_reader.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
@@ skipping 279 matching lines @@
     // Initialize FakeDriveService.
     fake_drive_service_.reset(new FakeDriveService);
     fake_drive_service_->LoadResourceListForWapi(
         "gdata/root_feed.json");
     fake_drive_service_->LoadAccountMetadataForWapi(
         "gdata/account_metadata.json");
 
     // Create a testee instance.
     fake_file_system_.reset(
         new test_util::FakeFileSystem(fake_drive_service_.get()));
-    fake_file_system_->Initialize();
   }
 
   FileSystemInterface* GetFileSystem() {
     return fake_file_system_.get();
   }
 
   DriveFileStreamReader::FileSystemGetter GetFileSystemGetter() {
     return base::Bind(&DriveFileStreamReaderTest::GetFileSystem,
                       base::Unretained(this));
   }
@@ skipping 166 matching lines @@
         google_apis::test_util::CreateQuitCallback(
             &run_loop,
             google_apis::test_util::CreateCopyResultCallback(&error, &entry)));
     run_loop.Run();
   }
   EXPECT_EQ(net::ERR_REQUEST_RANGE_NOT_SATISFIABLE, error);
   EXPECT_FALSE(entry);
 }
 
 }  // namespace drive