Revert of Default geometry processor

src/gpu/gl/GrGLSL.h

Index: src/gpu/gl/GrGLSL.h
diff --git a/src/gpu/gl/GrGLSL.h b/src/gpu/gl/GrGLSL.h
index 99671c130e0c5e3a431cc5b74a0ba27f2be7594c..b031a40a61c8508c863f55d3fdb041add7f19745 100644
--- a/src/gpu/gl/GrGLSL.h
+++ b/src/gpu/gl/GrGLSL.h
@@ -106,10 +106,6 @@
         return fExpr.c_str();
     }
 
-    bool isValid() const {
-        return kFullExpr_ExprType != fType || !fExpr.isEmpty();
-    }
-
 protected:
     /** Constructs an invalid expression.
      * Useful only as a return value from functions that never actually return
@@ -170,6 +166,10 @@
         fExpr.appendf(format, in0, in1);
     }
 
+    bool isValid() const {
+        return kFullExpr_ExprType != fType || !fExpr.isEmpty();
+    }
+
     /** Returns expression casted to another type.
      * Generic implementation that is called for non-trivial cases of casts. */
     template <typename T>