When GL_RGBA readPixels are slow do swizzle using a draw then readPixels with GL_BGRA

Review URL: http://codereview.appspot.com/5339051/


git-svn-id: http://skia.googlecode.com/svn/trunk@2631 2bbb7eff-a529-9590-31e7-b0007b416f81
13 files changed