GitLab

StreamCopyOrMoveImpl has some issue.
* Return infelicity error code.
* Don't notify to observer.
This issue is fixed in Issue 522543002 so we can support it in sandbox.

BUG=360088
TEST=content_unittests passed

Review URL: https://codereview.chromium.org/541363002

Cr-Commit-Position: refs/heads/master@{#293677}