Make sure tags are fetched.
Sync from src, otherwise we would always sync to latest commit.
Ignore some unnecessary deps.
Upgrade to 37.0.2062.102.
Apply patches for each sub directory.

After migration to git, we can only get patch from each deps instead
from the root, so we seperate the patches by the deps they are applying
to, to make the patch generation easier.
Convert all patches to git style.
Only deal with .patch files.
Stage the changes after applying patch.
Make sure the src is always on a branch.