Add gm that tests shaded stroked rectangles.

src/gpu/batches/GrNonAAStrokeRectBatch.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrNonAAStrokeRectBatch_DEFINED
 #define GrNonAAStrokeRectBatch_DEFINED
 
 #include "GrColor.h"
 
 #include "SkTypes.h"
 
 class GrDrawBatch;
 struct SkRect;
+class SkStrokeRec;
 class SkMatrix;
 
 namespace GrNonAAStrokeRectBatch {
 
 GrDrawBatch* Create(GrColor color,
                     const SkMatrix& viewMatrix,
                     const SkRect& rect,
-                    SkScalar strokeWidth,
+                    const SkStrokeRec&,
                     bool snapToPixelCenters);
 
-void Append(GrColor color,
-            const SkMatrix& viewMatrix,
-            const SkRect& rect,
-            SkScalar strokeWidth,
-            bool snapToPixelCenters);
-
-};
+}
 
 #endif