[S.P.] Merge getContentPicture into createContentPicture.

BUG=462077

Review URL: https://codereview.chromium.org/974903003

git-svn-id: svn://svn.chromium.org/blink/trunk@191268 bbb929c8-8fbe-4397-9dbb-9b2b20218538
3 files changed