Consolidate SkCanvas matrix virtuals.

Remove didTranslate, didScale, didRotate & didSkew, and rely on
didConcat instead. Subclasses can sniff the matrix type if they want to
differentiate.

(work in progress)

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

Author: fmalita@chromium.org

Review URL: https://codereview.chromium.org/203203004

git-svn-id: http://skia.googlecode.com/svn/trunk@13940 2bbb7eff-a529-9590-31e7-b0007b416f81
19 files changed