Revert "PDF: support perspective in simple shaders. (this version does not work well with tilling)"

Accidentally committed the wrong git branch.

This reverts commit 76839c65670df8a863041a82a4b61502e78af043.

Review URL: https://codereview.chromium.org/29743002

git-svn-id: http://skia.googlecode.com/svn/trunk/src@11865 2bbb7eff-a529-9590-31e7-b0007b416f81
2 files changed