Revert "remove legacy flags from google3"
Revert "remove legacy flags from google3"

This reverts commit d71730accb629f8c67de58c277fc6bc94f8fc222.

Reason for revert: broke g3, have fix underway

Original change's description:
> remove legacy flags from google3
> 
> Bug: skia:6481,skia:6513
> Change-Id: I3aac61df1252c16d1b7b8b4d78955da9accc464e
> Reviewed-on: https://skia-review.googlesource.com/13777
> Reviewed-by: Mike Reed <f5cabf8735907151a446812c9875d6c0c712d847@google.com>
> 

TBR=f5cabf8735907151a446812c9875d6c0c712d847@google.com,reviews@skia.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: Iccb1721e0d2a0724f6bb503abcb4360727a78f90
Reviewed-on: https://skia-review.googlesource.com/13801
Reviewed-by: Mike Reed <f5cabf8735907151a446812c9875d6c0c712d847@google.com>
Commit-Queue: Mike Reed <f5cabf8735907151a446812c9875d6c0c712d847@google.com>

Hikari-no-Tenshi/android_external_skia,Hikari-no-Tenshi/android_external_skia,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia,Hikari-no-Tenshi/android_external_skia,rubenvb/skia,Hikari-no-Tenshi/android_external_skia,rubenvb/skia,google/skia,aosp-mirror/platform_external_skia,google/skia,HalCanary/skia-hc,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,google/skia,google/skia,google/skia,google/skia,google/skia,HalCanary/skia-hc,HalCanary/skia-hc,HalCanary/skia-hc,aosp-mirror/platform_external_skia,Hikari-no-Tenshi/android_external_skia,HalCanary/skia-hc,aosp-mirror/platform_external_skia,HalCanary/skia-hc,aosp-mirror/platform_external_skia,rubenvb/skia,HalCanary/skia-hc,HalCanary/skia-hc,google/skia,rubenvb/skia,Hikari-no-Tenshi/android_external_skia,rubenvb/skia,aosp-mirror/platform_external_skia,HalCanary/skia-hc,aosp-mirror/platform_external_skia,rubenvb/skia,rubenvb/skia,HalCanary/skia-hc,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia,rubenvb/skia,google/skia,rubenvb/skia,rubenvb/skia