drive: Use OperationTestBase from CreateDirectoryOperationTest

chrome/browser/chromeos/drive/file_system/create_directory_operation.h

 // Copyright (c) 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_CREATE_DIRECTORY_OPERATION_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_CREATE_DIRECTORY_OPERATION_H_
 
 #include "base/basictypes.h"
 #include "base/files/file_path.h"
 #include "base/gtest_prod_util.h"
@@ skipping 40 matching lines @@
   // already at the |directory_path|.
   // If |is_recursive| is true, the invocation creates parent directories as
   // needed just like mkdir -p does.
   // Invokes |callback| when finished with the result of the operation.
   // |callback| must not be null.
   void CreateDirectory(const base::FilePath& directory_path,
                        bool is_exclusive,
                        bool is_recursive,
                        const FileOperationCallback& callback);
 
+ private:
   // Returns the file path to the existing deepest directory, which appears
   // in the |file_path|, with |entry| storing the directory's resource entry.
   // If not found, returns an empty file path.
   // This should run on |blocking_task_runner_|.
-  // This is public for testing.
   static base::FilePath GetExistingDeepestDirectory(
       internal::ResourceMetadata* metadata,
       const base::FilePath& directory_path,
       ResourceEntry* entry);
 
- private:
   // Part of CreateDirectory(). Called after GetExistingDeepestDirectory
   // is completed.
   void CreateDirectoryAfterGetExistingDeepestDirectory(
       const base::FilePath& directory_path,
       bool is_exclusive,
       bool is_recursive,
       const FileOperationCallback& callback,
       ResourceEntry* existing_deepest_directory_entry,
       const base::FilePath& existing_deepest_directory_path);
 
@@ skipping 32 matching lines @@
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate the weak pointers before any other members are destroyed.
   base::WeakPtrFactory<CreateDirectoryOperation> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(CreateDirectoryOperation);
 };
 
 }  // namespace file_system
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILE_SYSTEM_CREATE_DIRECTORY_OPERATION_H_