replace SkScalarMulRound(a,b) with SkScalarRountToInt(a*b)

BUG=
R=sugoi@google.com

Review URL: https://codereview.chromium.org/111393010

git-svn-id: http://skia.googlecode.com/svn/trunk@12740 2bbb7eff-a529-9590-31e7-b0007b416f81
5 files changed