Remove extra proctected in GrRODrawState.h

BUG=skia:
R=bsalomon@google.com

Author: egdaniel@google.com

Review URL: https://codereview.chromium.org/550243002

src/gpu/GrRODrawState.h

diff --git a/src/gpu/GrRODrawState.h b/src/gpu/GrRODrawState.h
index bba50c5..718f017 100644
--- a/src/gpu/GrRODrawState.h
+++ b/src/gpu/GrRODrawState.h
@@ -359,7 +359,6 @@
 
     friend class GrDrawTarget;
 
-protected:
     bool isEqual(const GrRODrawState& that) const;
 
     // These fields are roughly sorted by decreasing likelihood of being different in op==