Remove GrStagedProcessor, remove the word Stage as it applies to FPs

Committed: https://skia.googlesource.com/skia/+/24243446cdf7b7e4e132c2a0c387c7723777e0c7

Review URL: https://codereview.chromium.org/1307223004
diff --git a/src/effects/SkLightingImageFilter.cpp b/src/effects/SkLightingImageFilter.cpp
index 58978b7..2bb1582 100644
--- a/src/effects/SkLightingImageFilter.cpp
+++ b/src/effects/SkLightingImageFilter.cpp
@@ -354,7 +354,7 @@
     GrPaint paint;
     GrFragmentProcessor* fp = this->getFragmentProcessor(paint.getProcessorDataManager(), src,
                                                          matrix, bounds, boundaryMode);
-    paint.addColorProcessor(fp)->unref();
+    paint.addColorFragmentProcessor(fp)->unref();
     drawContext->drawNonAARectToRect(dst->asRenderTarget(), clip, paint, SkMatrix::I(),
                                      dstRect, srcRect);
 }