A pointer should be sufficient for Range::compareBoundaryPoints

It is because this function does not save Range object to anywhere.

Review URL: https://codereview.chromium.org/409283003

git-svn-id: svn://svn.chromium.org/blink/trunk@178790 bbb929c8-8fbe-4397-9dbb-9b2b20218538
[refactor] Remove the redundant blink:: prefix from modules/crypto.

Review URL: https://codereview.chromium.org/416593002

git-svn-id: svn://svn.chromium.org/blink/trunk@178791 bbb929c8-8fbe-4397-9dbb-9b2b20218538