Add dev bounds to bmp txt context, use bounds to ignore clips

R=robertphillips@google.com, jvanverth@google.com

Author: bsalomon@google.com

Review URL: https://codereview.chromium.org/144283004

git-svn-id: http://skia.googlecode.com/svn/trunk@13413 2bbb7eff-a529-9590-31e7-b0007b416f81
7 files changed