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/GrRectBlurEffect.cpp b/src/gpu/effects/generated/GrRectBlurEffect.cpp
index 567f838..6e98b02 100644
--- a/src/gpu/effects/generated/GrRectBlurEffect.cpp
+++ b/src/gpu/effects/generated/GrRectBlurEffect.cpp
@@ -153,9 +153,9 @@
     return std::make_unique<GrRectBlurEffect>(*this);
 }
 #if GR_TEST_UTILS
-SkString GrRectBlurEffect::dumpInfo() const {
-    return SkStringPrintf("RectBlurEffect(rect=float4(%f, %f, %f, %f), isFast=%s)", rect.left(),
-                          rect.top(), rect.right(), rect.bottom(), (isFast ? "true" : "false"));
+SkString GrRectBlurEffect::onDumpInfo() const {
+    return SkStringPrintf("(rect=float4(%f, %f, %f, %f), isFast=%s)", rect.left(), rect.top(),
+                          rect.right(), rect.bottom(), (isFast ? "true" : "false"));
 }
 #endif
 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrRectBlurEffect);