Revert "Revert "Add integer texture support.""

This reverts commit 9c7edb8311409a141b0dc1d5e480c68c629f1997.

Fixes ASAN errors

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4736

Change-Id: I1b1dae754d357b01da7169c8e7c59d7d8d8a10f6
Reviewed-on: https://skia-review.googlesource.com/4736
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
diff --git a/src/sksl/SkSLCompiler.cpp b/src/sksl/SkSLCompiler.cpp
index 27fd662..4794759 100644
--- a/src/sksl/SkSLCompiler.cpp
+++ b/src/sksl/SkSLCompiler.cpp
@@ -111,6 +111,8 @@
     ADD_TYPE(Sampler2DMS);
     ADD_TYPE(Sampler2DMSArray);
 
+    ADD_TYPE(ISampler2D);
+
     ADD_TYPE(GSampler1D);
     ADD_TYPE(GSampler2D);
     ADD_TYPE(GSampler3D);