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/GrCircleEffect.cpp b/src/gpu/effects/generated/GrCircleEffect.cpp
index 3562460..272d332 100644
--- a/src/gpu/effects/generated/GrCircleEffect.cpp
+++ b/src/gpu/effects/generated/GrCircleEffect.cpp
@@ -30,8 +30,8 @@
         auto radius = _outer.radius;
         (void)radius;
         prevRadius = -1.0;
-        circleVar = args.fUniformHandler->addUniform(kFragment_GrShaderFlag, kFloat4_GrSLType,
-                                                     "circle");
+        circleVar = args.fUniformHandler->addUniform(&_outer, kFragment_GrShaderFlag,
+                                                     kFloat4_GrSLType, "circle");
         fragBuilder->codeAppendf(
                 "float2 prevCenter;\nfloat prevRadius = %f;\nhalf d;\n@if (%d == 2 || %d == 3) {\n "
                 "   d = half((length((%s.xy - sk_FragCoord.xy) * %s.w) - 1.0) * %s.z);\n} else {\n "