Convert //chrome/browser/chromeos from scoped_ptr to std::unique_ptr

chrome/browser/chromeos/fileapi/mtp_file_system_backend_delegate.h

Index: chrome/browser/chromeos/fileapi/mtp_file_system_backend_delegate.h
diff --git a/chrome/browser/chromeos/fileapi/mtp_file_system_backend_delegate.h b/chrome/browser/chromeos/fileapi/mtp_file_system_backend_delegate.h
index 4d20d7a9bf478a18f9bf960ae18716541e86cf4b..4bfd32f14081eea25f222196d8fee6d985f1d65a 100644
--- a/chrome/browser/chromeos/fileapi/mtp_file_system_backend_delegate.h
+++ b/chrome/browser/chromeos/fileapi/mtp_file_system_backend_delegate.h
@@ -7,8 +7,9 @@
 
 #include <stdint.h>
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "chrome/browser/chromeos/fileapi/file_system_backend_delegate.h"
 #include "chrome/browser/chromeos/fileapi/mtp_watcher_manager.h"
 
@@ -40,13 +41,13 @@ class MTPFileSystemBackendDelegate : public FileSystemBackendDelegate {
   // FileSystemBackendDelegate overrides.
   storage::AsyncFileUtil* GetAsyncFileUtil(
       storage::FileSystemType type) override;
-  scoped_ptr<storage::FileStreamReader> CreateFileStreamReader(
+  std::unique_ptr<storage::FileStreamReader> CreateFileStreamReader(
       const storage::FileSystemURL& url,
       int64_t offset,
       int64_t max_bytes_to_read,
       const base::Time& expected_modification_time,
       storage::FileSystemContext* context) override;
-  scoped_ptr<storage::FileStreamWriter> CreateFileStreamWriter(
+  std::unique_ptr<storage::FileStreamWriter> CreateFileStreamWriter(
       const storage::FileSystemURL& url,
       int64_t offset,
       storage::FileSystemContext* context) override;
@@ -56,8 +57,8 @@ class MTPFileSystemBackendDelegate : public FileSystemBackendDelegate {
                                  const storage::URLCallback& callback) override;
 
  private:
-  scoped_ptr<DeviceMediaAsyncFileUtil> device_media_async_file_util_;
-  scoped_ptr<MTPWatcherManager> mtp_watcher_manager_;
+  std::unique_ptr<DeviceMediaAsyncFileUtil> device_media_async_file_util_;
+  std::unique_ptr<MTPWatcherManager> mtp_watcher_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(MTPFileSystemBackendDelegate);
 };