Key shader on whether frag pos read is relative to top-left or bottom-left

tests/GLProgramsTest.cpp

Index: tests/GLProgramsTest.cpp
diff --git a/tests/GLProgramsTest.cpp b/tests/GLProgramsTest.cpp
index d996cd74021e3c8b262f9aa9eec7fb40129cf5e8..73d6db2f46f484d51678ff8a5f6a07e15601d4a6 100644
--- a/tests/GLProgramsTest.cpp
+++ b/tests/GLProgramsTest.cpp
@@ -70,7 +70,7 @@ void GrGLProgramDesc::setRandom(SkMWCRandom* random,
     }
 
     if (dstRead) {
-        this->fDstRead = GrGLShaderBuilder::KeyForDstRead(dstTexture, gpu->glCaps());
+        this->fDstReadKey = GrGLShaderBuilder::KeyForDstRead(dstTexture, gpu->glCaps());
     }
 
     CoverageOutput coverageOutput;