Improve caching of special case paths in GrStencilAndCoverPathRenderer

src/gpu/GrPath.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrPath_DEFINED
 #define GrPath_DEFINED
 
@@ skipping 12 matching lines @@
     GrPath(GrGpu* gpu, const SkPath& skPath, const GrStrokeInfo& stroke)
         : INHERITED(gpu, kCached_LifeCycle)
         , fBounds(skPath.getBounds())
 #ifdef SK_DEBUG
         , fSkPath(skPath)
         , fStroke(stroke)
 #endif
     {
     }
 
-    static void ComputeKey(const SkPath& path, const GrStrokeInfo& stroke, GrUniqueKey* key);
+    static void ComputeKey(const SkPath& path, const GrStrokeInfo& stroke, GrUniqueKey* key,
+                           bool* outIsVolatile);
 
     const SkRect& getBounds() const { return fBounds; }
 
 #ifdef SK_DEBUG
     bool isEqualTo(const SkPath& path, const GrStrokeInfo& stroke) {
         return fSkPath == path && fStroke.hasEqualEffect(stroke);
     }
 #endif
 
 protected:
     SkRect fBounds;
 #ifdef SK_DEBUG
     SkPath fSkPath;
     GrStrokeInfo fStroke;
 #endif
 
 private:
     typedef GrGpuResource INHERITED;
 };
 
 #endif