Roll external/skia 228f76111..08b79b73a (6 commits)
https://skia.googlesource.com/skia.git/+log/228f76111..08b79b73a
2017-08-14 ethannicholas@google.com reduced number of string copies in SkSL parser
2017-08-14 skia-deps-roller@chromium.org Roll skia/third_party/externals/angle2/ 0d671c9a7..9b11ea4f2 (1 commit)
2017-08-14 mtklein@chromium.org Record SkCanvas::flush().
2017-08-14 brianosman@google.com Fix tracing macros for framework builds
2017-08-14 benjaminwagner@google.com Run perf tests on glsrgb and glessrgb configs.
2017-08-14 benjaminwagner@google.com Fix dm when --config not specified.
Test: Presubmit checks will test this change.
Change-Id: Ifb0310a63a62e0a465d81fb43d28468ba72c4a0f