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

src/gpu/gl/GrGLProgramDesc.cpp

Index: src/gpu/gl/GrGLProgramDesc.cpp
diff --git a/src/gpu/gl/GrGLProgramDesc.cpp b/src/gpu/gl/GrGLProgramDesc.cpp
index 6b38cc6d938459c79783f9c3a6de7efe9e7f84b3..5365ffbf043aac5c102f60f542ffdd1758784c4d 100644
--- a/src/gpu/gl/GrGLProgramDesc.cpp
+++ b/src/gpu/gl/GrGLProgramDesc.cpp
@@ -134,8 +134,9 @@
         return false;
     }
 
-    for (int i = 0; i < pipeline.numFragmentProcessors(); ++i) {
-        const GrFragmentProcessor& fp = pipeline.getFragmentProcessor(i);
+    for (int s = 0; s < pipeline.numFragmentStages(); ++s) {
+        const GrPendingFragmentStage& fps = pipeline.getFragmentStage(s);
+        const GrFragmentProcessor& fp = *fps.processor();
         if (!get_frag_proc_and_meta_keys(primProc, fp, gpu->glCaps(), &b)) {
             glDesc->key().reset();
             return false;
@@ -166,8 +167,8 @@
         header->fFragPosKey = 0;
     }
     header->fSnapVerticesToPixelCenters = pipeline.snapVerticesToPixelCenters();
-    header->fColorEffectCnt = pipeline.numColorFragmentProcessors();
-    header->fCoverageEffectCnt = pipeline.numCoverageFragmentProcessors();
+    header->fColorEffectCnt = pipeline.numColorFragmentStages();
+    header->fCoverageEffectCnt = pipeline.numCoverageFragmentStages();
     glDesc->finalize();
     return true;
 }