Remove SkCanvas::isDrawingToLayer

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 380 matching lines @@
     int getSaveCount() const;
 
     /** Efficient way to pop any calls to save() that happened after the save
         count reached saveCount. It is an error for saveCount to be greater than
         getSaveCount(). To pop all the way back to the initial matrix/clip context
         pass saveCount == 1.
         @param saveCount    The number of save() levels to restore from
     */
     void restoreToCount(int saveCount);
 
-    /** Returns true if drawing is currently going to a layer (from saveLayer)
-     *  rather than to the root device.
-     */
-    virtual bool isDrawingToLayer() const;
-
     /** Preconcat the current matrix with the specified translation
         @param dx   The distance to translate in X
         @param dy   The distance to translate in Y
     */
     void translate(SkScalar dx, SkScalar dy);
 
     /** Preconcat the current matrix with the specified scale.
         @param sx   The amount to scale in X
         @param sy   The amount to scale in Y
     */
@@ skipping 1075 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