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/gpu/GrSWMaskHelper.cpp b/src/gpu/GrSWMaskHelper.cpp
index f421b81..ce00ad9 100644
--- a/src/gpu/GrSWMaskHelper.cpp
+++ b/src/gpu/GrSWMaskHelper.cpp
@@ -366,7 +366,7 @@
     maskMatrix.setIDiv(texture->width(), texture->height());
     maskMatrix.preTranslate(SkIntToScalar(-rect.fLeft), SkIntToScalar(-rect.fTop));
 
-    pipelineBuilder->addCoverageProcessor(
+    pipelineBuilder->addCoverageFragmentProcessor(
                          GrSimpleTextureEffect::Create(pipelineBuilder->getProcessorDataManager(),
                                                        texture,
                                                        maskMatrix,