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> Distribute extra memory evenly among visible clients
> 
> After computing all clients' memory budgets, take any
> extra memory left over and distribute it amongst the
> visible clients (so that, if their memory requirments
> suddenly jump, they don't need to wait for a roundtrip
> to the GPU process to get extra memory).
> 
> Disallow keeping around backgrounded tabs' contents on
> Android, to keep the maximum for the main tab.
> 
> Explicitly limit the memory to use for prepainting by
> specifying NiceToHave on Mac to avoid performance problems.
> 
> BUG=175125
> 
> Review URL: https://codereview.chromium.org/12226082

TBR=ccameron@chromium.org
Review URL: https://codereview.chromium.org/12208134

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@181962 0039d316-1c4b-4281-b951-d872f2087c98