Review URL: https://codereview.chromium.org/1271023002
SK_API = __declspec(dllexport) / __attribute__((visibility("default"))) Also, add documentation in experimental/c-api-example/c.md Review URL: https://codereview.chromium.org/1307183006
BUG=skia: TBR= Review URL: https://codereview.chromium.org/822203002