Cosmetic portion of reverted "Fix ClipMaskManager's SW-fallback logic" CL

This CL isolates the cosmetic portion so the functional portion is clearer. It relies on https://codereview.chromium.org/1412883005/ (Fix ClipMaskManager's SW-fallback logic (take 2))

Review URL: https://codereview.chromium.org/1422023003
diff --git a/src/gpu/GrPathRendererChain.cpp b/src/gpu/GrPathRendererChain.cpp
index b1eb320..c6bc4c0 100644
--- a/src/gpu/GrPathRendererChain.cpp
+++ b/src/gpu/GrPathRendererChain.cpp
@@ -40,7 +40,7 @@
 }
 
 GrPathRenderer* GrPathRendererChain::getPathRenderer(const GrShaderCaps* shaderCaps,
-                                                     const GrPipelineBuilder* pipelineBuilder,
+                                                     const GrPipelineBuilder& pipelineBuilder,
                                                      const SkMatrix& viewMatrix,
                                                      const SkPath& path,
                                                      const GrStrokeInfo& stroke,
@@ -70,7 +70,7 @@
     for (int i = 0; i < fChain.count(); ++i) {
         GrPathRenderer::CanDrawPathArgs args;
         args.fShaderCaps = shaderCaps;
-        args.fPipelineBuilder = pipelineBuilder;
+        args.fPipelineBuilder = &pipelineBuilder;
         args.fViewMatrix = &viewMatrix;
         args.fPath = &path;
         args.fStroke = &stroke;