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, 1 deletions

diff --git a/src/gpu/GrShaderCaps.cpp b/src/gpu/GrShaderCaps.cpp
index 9a429bb0de..636b955ab7 100644
--- a/src/gpu/GrShaderCaps.cpp
+++ b/src/gpu/GrShaderCaps.cpp
@@ -213,12 +213,13 @@ void GrShaderCaps::initSamplerPrecisionTable() {
         table[kSRGBA_8888_GrPixelConfig]     = lowp;
         table[kSBGRA_8888_GrPixelConfig]     = lowp;
         table[kRGBA_8888_sint_GrPixelConfig] = lowp;
+        table[kETC1_GrPixelConfig]           = lowp;
         table[kRGBA_float_GrPixelConfig]     = kHigh_GrSLPrecision;
         table[kRG_float_GrPixelConfig]       = kHigh_GrSLPrecision;
         table[kAlpha_half_GrPixelConfig]     = mediump;
         table[kRGBA_half_GrPixelConfig]      = mediump;
 
-        GR_STATIC_ASSERT(14 == kGrPixelConfigCnt);
+        GR_STATIC_ASSERT(15 == kGrPixelConfigCnt);
     }
 }