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

src/effects/SkBlurMaskFilter.cpp

Index: src/effects/SkBlurMaskFilter.cpp
diff --git a/src/effects/SkBlurMaskFilter.cpp b/src/effects/SkBlurMaskFilter.cpp
index 7faf52e368b0fa2cbdd381a9b177399ec6efb57e..96789c2d357e232f7a3e3a736df7fc2418163884 100644
--- a/src/effects/SkBlurMaskFilter.cpp
+++ b/src/effects/SkBlurMaskFilter.cpp
@@ -859,7 +859,7 @@
         return false;
     }
 
-    grp->addCoverageFragmentProcessor(fp);
+    grp->addCoverageProcessor(fp);
 
     SkMatrix inverse;
     if (!viewMatrix.invert(&inverse)) {
@@ -1135,7 +1135,7 @@
         return false;
     }
 
-    grp->addCoverageFragmentProcessor(fp);
+    grp->addCoverageProcessor(fp);
 
     SkMatrix inverse;
     if (!viewMatrix.invert(&inverse)) {
@@ -1211,8 +1211,8 @@
         SkMatrix matrix;
         matrix.setIDiv(src->width(), src->height());
         // Blend pathTexture over blurTexture.
-        paint.addCoverageFragmentProcessor(
-            GrSimpleTextureEffect::Create(paint.getProcessorDataManager(), src, matrix))->unref();
+        paint.addCoverageProcessor(GrSimpleTextureEffect::Create(paint.getProcessorDataManager(),
+                                                                 src, matrix))->unref();
         if (kInner_SkBlurStyle == fBlurStyle) {
             // inner:  dst = dst * src
             paint.setCoverageSetOpXPFactory(SkRegion::kIntersect_Op);