Use noperspective interpolation for 2D draws

src/gpu/gl/GrGLVaryingHandler.h

Index: src/gpu/gl/GrGLVaryingHandler.h
diff --git a/src/gpu/gl/GrGLVaryingHandler.h b/src/gpu/gl/GrGLVaryingHandler.h
index fe8c3dca69646ae596712574bfdfc2fb3eb0a825..c4e5ba457e988c10cfa7f3907448aacae32aacab 100644
--- a/src/gpu/gl/GrGLVaryingHandler.h
+++ b/src/gpu/gl/GrGLVaryingHandler.h
@@ -24,12 +24,9 @@ public:
                                            GrSLPrecision fsPrecision = kDefault_GrSLPrecision);
 
 private:
-    void onFinalize() override {}
+    void onFinalize() override;
 
-    typedef GrGLProgramDataManager::VaryingInfo VaryingInfo;
-    typedef GrGLProgramDataManager::VaryingInfoArray VaryingInfoArray;
-
-    VaryingInfoArray fPathProcVaryingInfos;
+    GrGLProgramDataManager::VaryingInfoArray fPathProcVaryingInfos;
 
     friend class GrGLProgramBuilder;