Add RetainedRef uses where needed.

This patch adds RetainedRef uses where they are required. These
changes will be required when we remove automatic unwrapping of
scoped_refptrs in Bind.

Please see the bug for more context.

[email protected], [email protected], [email protected]
BUG=589048

Review URL: https://codereview.chromium.org/1815363002

Cr-Commit-Position: refs/heads/master@{#382371}
114 files changed