gn format // (the rest, except mojo)

Excluded mojo because I think that needs to happen on the other side.

At gn --version = 306668 for which roll is in CQ.

R=brettw@chromium.org
TBR=scherkus@chromium.org
BUG=348474

Review URL: https://codereview.chromium.org/774353003

Cr-Commit-Position: refs/heads/master@{#306708}
105 files changed