Tracking uniform ownership

This is a prerequisite change for the upcoming sample(child, matrix)
function. By itself, this CL doesn't really change anything; it just
adds an ownership tracking feature which sample(child, matrix) depends
on.

Change-Id: I98b12e5fb062a2535af367931e7a932ea9c63a59
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/281337
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
diff --git a/src/gpu/effects/generated/GrAARectEffect.cpp b/src/gpu/effects/generated/GrAARectEffect.cpp
index 85368ef..63f3a67 100644
--- a/src/gpu/effects/generated/GrAARectEffect.cpp
+++ b/src/gpu/effects/generated/GrAARectEffect.cpp
@@ -29,7 +29,7 @@
         (void)rect;
         prevRect = float4(-1.0);
         rectUniformVar = args.fUniformHandler->addUniform(
-                kFragment_GrShaderFlag, kFloat4_GrSLType, "rectUniform");
+                &_outer, kFragment_GrShaderFlag, kFloat4_GrSLType, "rectUniform");
         fragBuilder->codeAppendf(
                 "float4 prevRect = float4(%f, %f, %f, %f);\nhalf alpha;\n@switch (%d) {\n    case "
                 "0:\n    case 2:\n        alpha = half(all(greaterThan(float4(sk_FragCoord.xy, "