Changed auto child advance back to backwards linear search for getting subset of coords and sampler…

src/gpu/gl/builders/GrGLProgramBuilder.cpp

Index: src/gpu/gl/builders/GrGLProgramBuilder.cpp
diff --git a/src/gpu/gl/builders/GrGLProgramBuilder.cpp b/src/gpu/gl/builders/GrGLProgramBuilder.cpp
index 079b129cb1808d2794101c276d75d834ef8abd56..2db568693d8a678002866e1560692facb343a76e 100644
--- a/src/gpu/gl/builders/GrGLProgramBuilder.cpp
+++ b/src/gpu/gl/builders/GrGLProgramBuilder.cpp
@@ -124,7 +124,7 @@ void GrGLProgramBuilder::nameVariable(SkString* out, char prefix, const char* na
             // Names containing "__" are reserved.
             out->append("x");
         }
-        out->appendf("_Stage%d", fStageIndex);
+        out->appendf("_Stage%d%s", fStageIndex, fFS.getMangleString().c_str());
     }
 }