wire up new json code in skiaserve

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_
@@ skipping 123 matching lines @@
      */
     void toggleCommand(int index, bool toggle);
 
     void setUserMatrix(SkMatrix matrix) {
         fUserMatrix = matrix;
     }
 
     SkString clipStackData() const { return fClipStackData; }
 
     /**
-        Returns a JSON object representing all of the draws. The encoder may use the UrlDataManager
-        to store binary data such as images, referring to them via URLs embedded in the JSON.
+        Returns a JSON object representing up to N draws, where N is < SkDebugCanvas::getSize().
+        The encoder may use the UrlDataManager to store binary data such as images, referring to
+        them via URLs embedded in the JSON.
      */
-    Json::Value toJSON(UrlDataManager& urlDataManager);
+    Json::Value toJSON(UrlDataManager& urlDataManager, int n);
 
 ////////////////////////////////////////////////////////////////////////////////
 // Inherited from SkCanvas
 ////////////////////////////////////////////////////////////////////////////////
 
     static const int kVizImageHeight = 256;
     static const int kVizImageWidth = 256;
 
     bool isClipEmpty() const override { return false; }
     bool isClipRect() const override { return true; }
@@ skipping 109 matching lines @@
     void outputPoints(const SkPoint* pts, int count);
     void outputPointsCommon(const SkPoint* pts, int count);
     void outputScalar(SkScalar num);
 
     void updatePaintFilterCanvas();
 
     typedef SkCanvas INHERITED;
 };
 
 #endif