Minor cleanup of clip mask manager

src/gpu/GrPathRendererChain.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrPathRendererChain_DEFINED
 #define GrPathRendererChain_DEFINED
 
 #include "GrPathRenderer.h"
 
-#include "SkRefCnt.h"
+#include "SkTypes.h"
 #include "SkTArray.h"
 
 class GrContext;
-class GrPipelineBuilder;
-class GrShaderCaps;
-class GrStrokeInfo;
-class SkMatrix;
-class SkPath;
 
 /**
  * Keeps track of an ordered list of path renderers. When a path needs to be
  * drawn this list is scanned to find the most preferred renderer. To add your
  * path renderer to the list implement the GrPathRenderer::AddPathRenderers
  * function.
  */
-class GrPathRendererChain : public SkRefCnt {
+class GrPathRendererChain : public SkNoncopyable {
 public:
     GrPathRendererChain(GrContext* context);
 
     ~GrPathRendererChain();
 
     /** Documents how the caller plans to use a GrPathRenderer to draw a path. It affects the PR
         returned by getPathRenderer */
     enum DrawType {
         kColor_DrawType,                    // draw to the color buffer, no AA
         kColorAntiAlias_DrawType,           // draw to color buffer, with partial coverage AA
         kStencilOnly_DrawType,              // draw just to the stencil buffer
         kStencilAndColor_DrawType,          // draw the stencil and color buffer, no AA
         kStencilAndColorAntiAlias_DrawType  // draw the stencil and color buffer, with partial
                                             // coverage AA.
     };
 
     /** Returns a GrPathRenderer compatible with the request if one is available. If the caller
         is drawing the path to the stencil buffer then stencilSupport can be used to determine
         whether the path can be rendered with arbitrary stencil rules or not. See comments on
         StencilSupport in GrPathRenderer.h. */
     GrPathRenderer* getPathRenderer(const GrPathRenderer::CanDrawPathArgs& args,
                                     DrawType drawType,
                                     GrPathRenderer::StencilSupport* stencilSupport);
 
 private:
-    GrPathRendererChain();
-
     // takes a ref and unrefs in destructor
     GrPathRenderer* addPathRenderer(GrPathRenderer* pr);
 
-    void init();
-
     enum {
         kPreAllocCount = 8,
     };
-    bool fInit;
-    GrContext*                                          fOwner;
     SkSTArray<kPreAllocCount, GrPathRenderer*, true>    fChain;
-
-    typedef SkRefCnt INHERITED;
 };
 
 #endif