Add layer counting to SkPictureRecord

src/core/SkPictureData.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 SkPictureData_DEFINED
 #define SkPictureData_DEFINED
 
@@ skipping 164 matching lines @@
      */
     bool suitableForGpuRasterization(GrContext* context, const char **reason,
                                      int sampleCount = 0) const;
 
     /**
      * Calls getRecommendedSampleCount with GrPixelConfig and dpi to calculate sampleCount
      * and then calls the above version of suitableForGpuRasterization
      */
     bool suitableForGpuRasterization(GrContext* context, const char **reason,
                                      GrPixelConfig config, SkScalar dpi) const;
+
+    bool suitableForLayerOptimization() const;
 #endif
 
 private:
     friend class SkPicture; // needed in SkPicture::clone (rm when it is removed)
 
     void init();
 
     // these help us with reading/writing
     bool parseStreamTag(SkStream*, uint32_t tag, uint32_t size, SkPicture::InstallPixelRefProc);
     bool parseBufferTag(SkReadBuffer&, uint32_t tag, uint32_t size);
@@ skipping 25 matching lines @@
 
     const SkPictInfo fInfo;
 
     static void WriteFactories(SkWStream* stream, const SkFactorySet& rec);
     static void WriteTypefaces(SkWStream* stream, const SkRefCntSet& rec);
 
     void initForPlayback() const;
 };
 
 #endif