Revert "[PDF] Handle failures of matrix inversion" while I investigate fixed point failures.

This reverts commit r3711

Review URL: https://codereview.appspot.com/6050049

git-svn-id: http://skia.googlecode.com/svn/trunk@3712 2bbb7eff-a529-9590-31e7-b0007b416f81
4 files changed