Without being registered, the twopointconical GM fails
when using --pipe or --serialize, since this gradient
will not be flattened/unflattened.
Review URL: https://codereview.appspot.com/6294060
git-svn-id: http://skia.googlecode.com/svn/trunk@4226
2bbb7eff-a529-9590-31e7-
b0007b416f81
SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(Radial_Gradient)
SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(Sweep_Gradient)
SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(Two_Point_Radial_Gradient)
+ SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(Two_Point_Conical_Gradient)
SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END