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

gm/bigrrectaaeffect.cpp

Index: gm/bigrrectaaeffect.cpp
diff --git a/gm/bigrrectaaeffect.cpp b/gm/bigrrectaaeffect.cpp
index f19b57ce45ebb421497d656ce2c33aef9ad346db..cf151fb1bd9889c8468e665ef70dfec7310bab2e 100644
--- a/gm/bigrrectaaeffect.cpp
+++ b/gm/bigrrectaaeffect.cpp
@@ -77,7 +77,7 @@
                     SkAutoTUnref<GrFragmentProcessor> fp(GrRRectEffect::Create(edgeType, rrect));
                     SkASSERT(fp);
                     if (fp) {
-                        pipelineBuilder.addCoverageFragmentProcessor(fp);
+                        pipelineBuilder.addCoverageProcessor(fp);
                         pipelineBuilder.setRenderTarget(rt);
 
                         SkRect bounds = SkRect::MakeWH(SkIntToScalar(kMaxSize),