Fix rendering artifacts in pull-saveLayers-forward mode

src/core/SkPictureStateTree.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 SkPictureStateTree_DEFINED
 #define SkPictureStateTree_DEFINED
@@ skipping 64 matching lines @@
     class Iterator {
     public:
         /** Returns the next op offset needed to create the drawing state
             required by the queued up draw operation or the offset of the queued
             up draw operation itself. In the latter case, the next draw operation
             will move into the queued up slot.
             It retuns kDrawComplete when done.
             TODO: this might be better named nextOp
         */
         uint32_t nextDraw();
-        /** Peek at the currently queued up draw op's offset. Note that this can
-            be different then what 'nextDraw' would return b.c. it is
-            the offset of the next _draw_ op while 'nextDraw' can return
-            the offsets to saveLayer and clip ops while it is creating the proper
-            drawing context for the queued up draw op.
-        */
-        uint32_t peekDraw();
-        /** Stop trying to create the drawing context for the currently queued
-            up _draw_ operation and queue up the next one. This call returns
-            the offset of the skipped _draw_ operation. Obviously (since the
-            correct drawing context has not been established), the skipped
-            _draw_ operation should not be issued. Returns kDrawComplete if
-            the end of the draw operations is reached.
-         */
-        uint32_t skipDraw();
         static const uint32_t kDrawComplete = SK_MaxU32;
         Iterator() : fPlaybackMatrix(), fValid(false) { }
         bool isValid() const { return fValid; }
 
     private:
         Iterator(const SkTDArray<void*>& draws, SkCanvas* canvas, Node* root);
 
         void setCurrentMatrix(const SkMatrix*);
 
         // The draws this iterator is associated with
@@ skipping 56 matching lines @@
         };
     };
 
     Node fRoot;
     SkMatrix fRootMatrix;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif