GitLab

- Move detailed permission check code into each MountPointProvider
- Add common enum for fileapi permission policy (webkit/fileapi/file_permission_policy.{h,cc})

BUG=none, cleanup only
TEST=content_browsertests:FileSystemLayoutTest.*,browser_tests:FileBrowser*)

Review URL: https://codereview.chromium.org/11804005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@176014 0039d316-1c4b-4281-b951-d872f2087c98