[style] Run webcrypto files through clang-format.

The only other change was to delete two TODOs regarding style adjustments.

BUG=245025
R=rsleevi@chromium.org

Review URL: https://codereview.chromium.org/171503006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252122 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252122