This CL adds the script files of the separated Gallery.app.
Gallery.app refers a few Files.app script files, so the CL also changes so that the files can be imported from the Gallery.app

BUG=358698
TEST=manually

Review URL: https://codereview.chromium.org/246543002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@266531 0039d316-1c4b-4281-b951-d872f2087c98
27 files changed