Add compile guard for SkCanvas::LayerIter

include/core/SkCanvas.h

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkCanvas_DEFINED
 #define SkCanvas_DEFINED
 
@@ skipping 1202 matching lines @@
     typedef SkCanvasClipVisitor ClipVisitor;
     /**
      *  Replays the clip operations, back to front, that have been applied to
      *  the canvas, calling the appropriate method on the visitor for each
      *  clip. All clips have already been transformed into device space.
      */
     void replayClips(ClipVisitor*) const;
 
     ///////////////////////////////////////////////////////////////////////////
 
+#ifndef SK_SUPPORT_LEGACY_LAYERITER
 protected:
+#endif
     /** After calling saveLayer(), there can be any number of devices that make
         up the top-most drawing area. LayerIter can be used to iterate through
         those devices. Note that the iterator is only valid until the next API
         call made on the canvas. Ownership of all pointers in the iterator stays
         with the canvas, so none of them should be modified or deleted.
     */
     class SK_API LayerIter /*: SkNoncopyable*/ {
     public:
         /** Initialize iterator with canvas, and set values for 1st device */
         LayerIter(SkCanvas*, bool skipEmptyClips);
@@ skipping 346 matching lines @@
 
 class SkCanvasClipVisitor {
 public:
     virtual ~SkCanvasClipVisitor();
     virtual void clipRect(const SkRect&, SkRegion::Op, bool antialias) = 0;
     virtual void clipRRect(const SkRRect&, SkRegion::Op, bool antialias) = 0;
     virtual void clipPath(const SkPath&, SkRegion::Op, bool antialias) = 0;
 };
 
 #endif