This query might already be possible with MySQL 5.6, but that isn't GA yet and I don't use it yet. The data for this is also collected without scanning the buffer pool LRU and without locking the buffer pool mutex. It is always better to avoid adding contention on an already contended mutex. Hopefully the db-perf team can use this data to make the database tier more efficient.
select table_name, sum(innodb_buffer_pool_pages) n_pages
from table_statistics
group by table_name
order by 2 desc limit 10
+------------------+---------+
| table_name | n_pages |
+------------------+---------+
| table_one | 20149 |
| table_four | 12912 |
| table_seven | 6914 |
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