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

chrome/browser/chromeos/file_system_provider/operations/unmount.cc

Index: chrome/browser/chromeos/file_system_provider/operations/unmount.cc
diff --git a/chrome/browser/chromeos/file_system_provider/operations/unmount.cc b/chrome/browser/chromeos/file_system_provider/operations/unmount.cc
index 92c0155e1fc68b4875617aa9e4d53dc3fd09fac0..b0dd49fa4dfaeb210666666618417455dae9269c 100644
--- a/chrome/browser/chromeos/file_system_provider/operations/unmount.cc
+++ b/chrome/browser/chromeos/file_system_provider/operations/unmount.cc
@@ -35,13 +35,13 @@ bool Unmount::Execute(int request_id) {
 }
 
 void Unmount::OnSuccess(int /* request_id */,
-                        scoped_ptr<RequestValue> /* result */,
+                        std::unique_ptr<RequestValue> /* result */,
                         bool /* has_more */) {
   callback_.Run(base::File::FILE_OK);
 }
 
 void Unmount::OnError(int /* request_id */,
-                      scoped_ptr<RequestValue> /* result */,
+                      std::unique_ptr<RequestValue> /* result */,
                       base::File::Error error) {
   callback_.Run(error);
 }