Turned on SkSL->GLSL compiler
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2288033003

Committed: https://skia.googlesource.com/skia/+/9b0fe3d125f237d9884732a48414fa85fc71b4e3
Committed: https://skia.googlesource.com/skia/+/b12b3c6908c62c908b3680be01e3b5bfd30de310
Committed: https://skia.googlesource.com/skia/+/f008b0a59f45c0d4bea3e66faf3b01805009ec89
Committed: https://skia.googlesource.com/skia/+/08b2ccf398e2b81bc05d2c105837e5419899469b
Committed: https://skia.googlesource.com/skia/+/dcfe6dba4a335e50e86ff68e3252065d4197432c
Committed: https://skia.googlesource.com/skia/+/ccb1dd8f267f9d7fe7c9d0ce222ebc81b41853b3
Review-Url: https://codereview.chromium.org/2288033003
diff --git a/src/sksl/SkSLContext.h b/src/sksl/SkSLContext.h
index 1f124d0..82c265b 100644
--- a/src/sksl/SkSLContext.h
+++ b/src/sksl/SkSLContext.h
@@ -60,6 +60,7 @@
     , fSampler1D_Type(new Type("sampler1D", SpvDim1D, false, false, false, true))
     , fSampler2D_Type(new Type("sampler2D", SpvDim2D, false, false, false, true))
     , fSampler3D_Type(new Type("sampler3D", SpvDim3D, false, false, false, true))
+    , fSamplerExternalOES_Type(new Type("samplerExternalOES", SpvDim2D, false, false, false, true))
     , fSamplerCube_Type(new Type("samplerCube"))
     , fSampler2DRect_Type(new Type("sampler2DRect"))
     , fSampler1DArray_Type(new Type("sampler1DArray"))
@@ -169,6 +170,7 @@
     const std::unique_ptr<Type> fSampler1D_Type;
     const std::unique_ptr<Type> fSampler2D_Type;
     const std::unique_ptr<Type> fSampler3D_Type;
+    const std::unique_ptr<Type> fSamplerExternalOES_Type;
     const std::unique_ptr<Type> fSamplerCube_Type;
     const std::unique_ptr<Type> fSampler2DRect_Type;
     const std::unique_ptr<Type> fSampler1DArray_Type;