Refactor GrGpu path rendering functions to GrPathRendering

src/gpu/GrPathRange.h

Index: src/gpu/GrPathRange.h
diff --git a/src/gpu/GrPathRange.h b/src/gpu/GrPathRange.h
index 035837fc361d74cbecdbb4feb2f60a886ee195de..6820ada21becdc75e1f3601560d1e843702af7fe 100644
--- a/src/gpu/GrPathRange.h
+++ b/src/gpu/GrPathRange.h
@@ -83,7 +83,7 @@ protected:
 
 private:
     // Notify when paths will be drawn in case this is a lazy-loaded path range.
-    friend class GrGpu;
+    friend class GrPathRendering;
     void willDrawPaths(const void* indices, PathIndexType, int count) const;
     template<typename IndexType> void willDrawPaths(const void* indices, int count) const;