Add SK_SUPPORT_LEGACY_IMAGEFILTER_PTR to public.bzl DEFINES to fix build.

public.bzl

Index: public.bzl
diff --git a/public.bzl b/public.bzl
index 14a66a728c147bea8e2acb87c4788c28fe47a186..bf163d0a4d53c90b0bf9057684449eb71c8c9ff8 100644
--- a/public.bzl
+++ b/public.bzl
@@ -534,14 +534,15 @@ DEFINES_ALL = [
     # Chrome DEFINES.
     "SK_USE_FLOATBITS",
     "SK_USE_FREETYPE_EMBOLDEN",
-    "SK_SUPPORT_LEGACY_NEW_SURFACE_API",
-    "SK_SUPPORT_LEGACY_MINOR_EFFECT_PTR",
-    "SK_SUPPORT_LEGACY_PATHEFFECT_PTR",
     # Turn on a few Google3-specific build fixes.
     "GOOGLE3",
     # Staging flags for API changes
     "SK_SUPPORT_LEGACY_COLORFILTER_PTR",
     "SK_SUPPORT_LEGACY_CREATESHADER_PTR",
+    "SK_SUPPORT_LEGACY_IMAGEFILTER_PTR",
+    "SK_SUPPORT_LEGACY_MINOR_EFFECT_PTR",
+    "SK_SUPPORT_LEGACY_NEW_SURFACE_API",
+    "SK_SUPPORT_LEGACY_PATHEFFECT_PTR",
     "SK_SUPPORT_LEGACY_PICTURE_PTR",
     "SK_SUPPORT_LEGACY_XFERMODE_PTR",
 ]