Add `GrProcessor::onDumpInfo` for subclass info dumps.

This CL also marks `GrProcessor::dumpInfo` as final. This prevents a
subclass from mistakenly overriding `dumpInfo` instead of `onDumpInfo`.

`onDumpInfo` is responsible for providing the same data as `dumpInfo`,
except that the FP name is automatically prepended.

Change-Id: I2b44c30a01bc65e9d88321cc21651a94e20074c6
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/309793
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/src/gpu/effects/generated/GrAARectEffect.cpp b/src/gpu/effects/generated/GrAARectEffect.cpp
index 28b38ea..1a09603 100644
--- a/src/gpu/effects/generated/GrAARectEffect.cpp
+++ b/src/gpu/effects/generated/GrAARectEffect.cpp
@@ -111,9 +111,9 @@
     return std::make_unique<GrAARectEffect>(*this);
 }
 #if GR_TEST_UTILS
-SkString GrAARectEffect::dumpInfo() const {
-    return SkStringPrintf("AARectEffect(edgeType=%d, rect=float4(%f, %f, %f, %f))", (int)edgeType,
-                          rect.left(), rect.top(), rect.right(), rect.bottom());
+SkString GrAARectEffect::onDumpInfo() const {
+    return SkStringPrintf("(edgeType=%d, rect=float4(%f, %f, %f, %f))", (int)edgeType, rect.left(),
+                          rect.top(), rect.right(), rect.bottom());
 }
 #endif
 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrAARectEffect);