Expose SkComposeShader as SK_API.

This is used by the ChromeOS build of Chrome.
Review URL: http://codereview.appspot.com/4548054

git-svn-id: http://skia.googlecode.com/svn/trunk@1396 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed