Liberalize the size limits in the PNG decoder to match the changes landed upstream to all the WebKit image decoders.  I'm not sure where this is used, hence no test.
Liberalize the size limits in the PNG decoder to match the changes landed upstream to all the WebKit image decoders.  I'm not sure where this is used, hence no test.

BUG=3643
TEST=none
Review URL: http://codereview.chromium.org/118462

git-svn-id: http://src.chromium.org/svn/trunk/src@17988 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 51ab698c92b10b8e91bf8468ec48c28467401248
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser