Adding a flush method to SkCanvas

BUG=http://code.google.com/p/skia/issues/detail?id=467
REVIEW=http://codereview.appspot.com/5600044/
TEST=gm uses the new code path on all its test cases



git-svn-id: http://skia.googlecode.com/svn/trunk@3102 2bbb7eff-a529-9590-31e7-b0007b416f81
4 files changed