[SyncFS] Recheck created folder on FolderCreator

BUG=240165,328294

Review URL: https://codereview.chromium.org/99533006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240609 0039d316-1c4b-4281-b951-d872f2087c98
Flush after FileSystem API copy when necessary (case for intra-fs copies).

BUG=276276

Review URL: https://codereview.chromium.org/101423003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240610 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 240610
ONC: Some trivial cleanup in the Validator.

- Removed unused argument from the Validate*() methods.
- Fixed formatting.

BUG=NONE
R=dconnelly@chromium.org

Review URL: https://codereview.chromium.org/69933010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240611 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 240611