GitLab

Converts bookmarks and bookmarkManagerPrivate event related functions
to use the schema generated classes instead of manually constructing
JSON objects.

BUG=

Review URL: https://codereview.chromium.org/185293019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255290 0039d316-1c4b-4281-b951-d872f2087c98