remove non-static uses of SkOncePtr

src/core/SkBigPicture.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 SkBigPicture_DEFINED
 #define SkBigPicture_DEFINED
 
-#include "SkOncePtr.h"
+#include "SkOnce.h"
 #include "SkPicture.h"
 #include "SkRect.h"
 #include "SkTemplates.h"
 
 class SkBBoxHierarchy;
 class SkMatrix;
 class SkRecord;
 
 // An implementation of SkPicture supporting an arbitrary number of drawing commands.
 class SkBigPicture final : public SkPicture {
@@ skipping 36 matching lines @@
                          int start,
                          int stop,
                          const SkMatrix& initialCTM) const;
 // Used by GrRecordReplaceDraw
     const SkBBoxHierarchy* bbh() const { return fBBH; }
     const SkRecord*     record() const { return fRecord; }
     const AccelData* accelData() const { return fAccelData; }
 
 private:
     struct Analysis {
-        explicit Analysis(const SkRecord&);
+        void init(const SkRecord&);
 
         bool suitableForGpuRasterization(const char** reason) const;
 
         uint8_t fNumSlowPathsAndDashEffects;
         bool    fWillPlaybackBitmaps : 1;
         bool    fHasText             : 1;
     };
 
     int numSlowPaths() const override;
     const Analysis& analysis() const;
     int drawableCount() const;
     SkPicture const* const* drawablePicts() const;
 
     const SkRect                          fCullRect;
     const size_t                          fApproxBytesUsedBySubPictures;
-    SkOncePtr<const Analysis>             fAnalysis;
+    mutable SkOnce                        fAnalysisOnce;
+    mutable Analysis                      fAnalysis;
     SkAutoTUnref<const SkRecord>          fRecord;
     SkAutoTDelete<const SnapshotArray>    fDrawablePicts;
     SkAutoTUnref<const SkBBoxHierarchy>   fBBH;
     SkAutoTUnref<const AccelData>         fAccelData;
 };
 
 #endif//SkBigPicture_DEFINED