Increase the Skia default font cache from 16M to 20M
Increase the Skia default font cache from 16M to 20M

To run the page cycler Intl1 est without regression
on Leopard, 20M is needed. The current 16M, or an
increase to 18M, runs the test about 7% slower.

BUG: 97943
Review URL: http://codereview.chromium.org/8551007

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@110921 0039d316-1c4b-4281-b951-d872f2087c98

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