Revert "remove legacy google3 flag"

This reverts commit b8b2586dd3.

Reason for revert: broke google3

Original change's description:
> remove legacy google3 flag
> 
> Bug: skia:
> Change-Id: I9110f65e696a0c91c43954927dc05194797bf18c
> Reviewed-on: https://skia-review.googlesource.com/152960
> Reviewed-by: Mike Reed <reed@google.com>

TBR=reed@google.com

Change-Id: I2e0ff73c9ed340ef447de1606c618d2935fa8fae
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/153002
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>

public.bzl

@@ -608,6 +608,8 @@ def base_defines(os_conditions):
         "SK_JUMPER_DISABLE_8BIT",
         # JPEG is in codec_limited
         "SK_HAS_JPEG_LIBRARY",
+        # remove once we've fixed call-sites
+        "SK_SUPPORT_LEGACY_TYPEFACE_MAKEFROMSTREAM",
     ] + skia_select(
         os_conditions,
         [