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

chrome/browser/chromeos/fileapi/file_system_backend_delegate.h

Index: chrome/browser/chromeos/fileapi/file_system_backend_delegate.h
diff --git a/chrome/browser/chromeos/fileapi/file_system_backend_delegate.h b/chrome/browser/chromeos/fileapi/file_system_backend_delegate.h
index 39e151c00344b89af61c6828b78b22f594d4eb1c..333943e5ce76e32ea8ed7300699435ccf8acc3ca 100644
--- a/chrome/browser/chromeos/fileapi/file_system_backend_delegate.h
+++ b/chrome/browser/chromeos/fileapi/file_system_backend_delegate.h
@@ -7,8 +7,9 @@
 
 #include <stdint.h>
 
+#include <memory>
+
 #include "base/callback_forward.h"
-#include "base/memory/scoped_ptr.h"
 #include "storage/browser/fileapi/file_system_backend.h"
 #include "storage/common/fileapi/file_system_types.h"
 
@@ -40,7 +41,7 @@ class FileSystemBackendDelegate {
       storage::FileSystemType type) = 0;
 
   // Called from FileSystemBackend::CreateFileStreamReader().
-  virtual scoped_ptr<storage::FileStreamReader> CreateFileStreamReader(
+  virtual std::unique_ptr<storage::FileStreamReader> CreateFileStreamReader(
       const storage::FileSystemURL& url,
       int64_t offset,
       int64_t max_bytes_to_read,
@@ -48,7 +49,7 @@ class FileSystemBackendDelegate {
       storage::FileSystemContext* context) = 0;
 
   // Called from FileSystemBackend::CreateFileStreamWriter().
-  virtual scoped_ptr<storage::FileStreamWriter> CreateFileStreamWriter(
+  virtual std::unique_ptr<storage::FileStreamWriter> CreateFileStreamWriter(
       const storage::FileSystemURL& url,
       int64_t offset,
       storage::FileSystemContext* context) = 0;