remove obsolete build flags:

SK_IGNORE_TRANS_CLAMP_FIX
SK_IGNORE_1XN_BITMAP_OPT
SK_IGNORE_CLIP_BUG_FIX
SK_IGNORE_FAST_SCALEMATRIX_INVERT
SK_IGNORE_QUAD_STROKE_FIX
SK_IGNORE_MULTIPLY_XFERMODE_OPT
SK_IGNORE_LARGE_DASH_OPT
Review URL: https://codereview.appspot.com/7381050

git-svn-id: http://skia.googlecode.com/svn/trunk@7829 2bbb7eff-a529-9590-31e7-b0007b416f81
use forward matrix to determine if we can ignore scale part of a matrix
Review URL: https://codereview.chromium.org/14018020

git-svn-id: http://skia.googlecode.com/svn/trunk@8700 2bbb7eff-a529-9590-31e7-b0007b416f81
add () around | cluster, to avoid warning.

git-svn-id: http://skia.googlecode.com/svn/trunk@8701 2bbb7eff-a529-9590-31e7-b0007b416f81