Revert "Remove compressed (ETC1) texture support from Ganesh"

This reverts commit ee26363aaae62db2a851f2873e2405a9cf7f995a.

Reason for revert: Failing Google 3 roll.

Original change's description:
> Remove compressed (ETC1) texture support from Ganesh
> 
> Change-Id: If4cf286df87ea87338aba47001d90a5fcc4f2667
> Reviewed-on: https://skia-review.googlesource.com/17456
> Commit-Queue: Robert Phillips <robertphillips@google.com>
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> 

TBR=bsalomon@google.com,robertphillips@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: Ie1a57187287e03600a69e374501478e93c41415c
Reviewed-on: https://skia-review.googlesource.com/17527
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/BUILD.gn b/BUILD.gn
index a18b8b1148..19691ed442 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -136,6 +136,7 @@ config("skia_private") {
     "src/utils",
     "src/utils/win",
     "src/xml",
+    "third_party/etc1",
     "third_party/gif",
   ]
 
@@ -631,6 +632,7 @@ component("skia") {
     "src/sfnt/SkOTTable_name.cpp",
     "src/sfnt/SkOTUtils.cpp",
     "src/utils/mac/SkStream_mac.cpp",
+    "third_party/etc1/etc1.cpp",
     "third_party/gif/SkGifImageReader.cpp",
   ]