bookmarks: Remove in_memory_database.h include, it's unused.

By removing it, also means we can remove one more entry from the DEPS file.

BUG=144783
TBR=sky@chromium.org


Review URL: https://chromiumcodereview.appspot.com/12310049

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@184160 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed