Image writer client: create mojo client with MakeUnique<>

chrome/browser/extensions/api/image_writer_private/image_writer_utility_client.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_IMAGE_WRITER_PRIVATE_IMAGE_WRITER_UTILITY_CLIENT_H_
 #define CHROME_BROWSER_EXTENSIONS_API_IMAGE_WRITER_PRIVATE_IMAGE_WRITER_UTILITY_CLIENT_H_
 
 #include <stdint.h>
 
 #include "base/callback.h"
@@ skipping 47 matching lines @@
   virtual void Shutdown();
 
  protected:
   friend class base::RefCountedThreadSafe<ImageWriterUtilityClient>;
 
   virtual ~ImageWriterUtilityClient();
 
  private:
   class RemovableStorageWriterClientImpl;
 
-  // Ensures the utility process has been created.
-  void StartUtilityProcess();
-
+  void StartUtilityProcessIfNeeded();
   void UtilityProcessError();
 
   void OperationProgress(int64_t progress);
   void OperationSucceeded();
   void OperationFailed(const std::string& error);
 
   void ResetRequest();
 
   ProgressCallback progress_callback_;
   SuccessCallback success_callback_;
   ErrorCallback error_callback_;
 
   const scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   std::unique_ptr<content::UtilityProcessMojoClient<
       extensions::mojom::RemovableStorageWriter>>
       utility_process_mojo_client_;
 
   std::unique_ptr<RemovableStorageWriterClientImpl>
       removable_storage_writer_client_;
 
   DISALLOW_COPY_AND_ASSIGN(ImageWriterUtilityClient);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_IMAGE_WRITER_PRIVATE_IMAGE_WRITER_UTILITY_CLIENT_H_