This is a meta-bug to track memory reduction efforts.

Steps:
1. Open multiple tabs, perform actions.
2. Close all the tabs, wait for 10-60 seconds and measure memory.
3. Chrome memory stays up.

This is a common problem for everyone using chrome.

Results of heap profiling can be seen in these docs:

https://docs.google.com/document/d/1f88Z1QsynOvDnkV_hP3ez1vwEvhjgIhC6Je8H5zL5uc/edit#heading=h.ty8ognouxs8x

https://docs.google.com/a/google.com/document/d/1dLHOzmzhH4nUtb3_3P2k5ZPTCmJ3nC6syYHxTuZFMUQ/edit?usp=sharing

Now lets try to reduce some memory.