Add abilitly to query audit trail for batches by draw op

tools/debugger/SkDebugCanvas.cpp

Index: tools/debugger/SkDebugCanvas.cpp
diff --git a/tools/debugger/SkDebugCanvas.cpp b/tools/debugger/SkDebugCanvas.cpp
index 34e582e187754b5661236df25ed1bad16d356bbc..cc1733b7054fa3b33e3e201b674154d61058444f 100644
--- a/tools/debugger/SkDebugCanvas.cpp
+++ b/tools/debugger/SkDebugCanvas.cpp
@@ -336,7 +336,8 @@ Json::Value SkDebugCanvas::toJSON(UrlDataManager& urlDataManager, int n, SkCanva
     result[SKDEBUGCANVAS_ATTRIBUTE_VERSION] = Json::Value(SKDEBUGCANVAS_VERSION);
     Json::Value commands = Json::Value(Json::arrayValue);
     for (int i = 0; i < this->getSize() && i <= n; i++) {
-        commands[i] = this->getDrawCommandAt(i)->drawToAndCollectJSON(canvas, urlDataManager);
+        commands[i] = this->getDrawCommandAt(i)->drawToAndCollectJSON(canvas, urlDataManager,
+                                                                      i);
     }
     result[SKDEBUGCANVAS_ATTRIBUTE_COMMANDS] = commands;
     return result;