Added the framework for having canvas/recorder/picture record depth_set's.

tools/debugger/SkDebugCanvas.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 SKDEBUGCANVAS_H_
 #define SKDEBUGCANVAS_H_
@@ skipping 176 matching lines @@
     }
 
 protected:
     void willSave() override;
     SaveLayerStrategy getSaveLayerStrategy(const SaveLayerRec&) override;
     void willRestore() override;
 
     void didConcat(const SkMatrix&) override;
     void didSetMatrix(const SkMatrix&) override;
 
+    void didTranslateZ(SkScalar) override;
+
     void onDrawAnnotation(const SkRect&, const char[], SkData*) override;
     void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override;
     void onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y,
                     const SkPaint&) override;
     void onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[],
                        const SkPaint&) override;
     void onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[],
                         SkScalar constY, const SkPaint&) override;
     void onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
                           const SkMatrix* matrix, const SkPaint&) override;
@@ skipping 83 matching lines @@
     GrAuditTrail* getAuditTrail(SkCanvas*);
 
     void updatePaintFilterCanvas();
     void drawAndCollectBatches(int n, SkCanvas*);
     void cleanupAuditTrail(SkCanvas*);
 
     typedef SkCanvas INHERITED;
 };
 
 #endif