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/gradients/generated/GrTwoPointConicalGradientLayout.cpp b/src/gpu/gradients/generated/GrTwoPointConicalGradientLayout.cpp
index 8e9f2e8..5fabbba 100644
--- a/src/gpu/gradients/generated/GrTwoPointConicalGradientLayout.cpp
+++ b/src/gpu/gradients/generated/GrTwoPointConicalGradientLayout.cpp
@@ -40,8 +40,8 @@
         (void)isNativelyFocal;
         auto focalParams = _outer.focalParams;
         (void)focalParams;
-        focalParamsVar = args.fUniformHandler->addUniform(kFragment_GrShaderFlag, kHalf2_GrSLType,
-                                                          "focalParams");
+        focalParamsVar = args.fUniformHandler->addUniform(&_outer, kFragment_GrShaderFlag,
+                                                          kHalf2_GrSLType, "focalParams");
         SkString sk_TransformedCoords2D_0 =
                 fragBuilder->ensureCoords2D(args.fTransformedCoords[0].fVaryingPoint);
         fragBuilder->codeAppendf(