Add batch information to json

include/private/GrAuditTrail.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrAuditTrail_DEFINED
 #define GrAuditTrail_DEFINED
 
@@ skipping 49 matching lines @@
     }
 
     void addBatch(const char* name, const SkRect& bounds) {
         SkASSERT(GR_BATCH_DEBUGGING_OUTPUT && !fStack.empty());
         Batch* batch = new Batch;
         fStack.back()->fChildren.emplace_back(batch);
         batch->fName = name;
         batch->fBounds = bounds;
     }
 
-    SkString toJson() const;
+    SkString toJson(bool prettyPrint = false) const;
 
     void reset() { SkASSERT(GR_BATCH_DEBUGGING_OUTPUT && fStack.empty()); fFrames.reset(); }
 
 private:
     // TODO if performance becomes an issue, we can move to using SkVarAlloc
     struct Event {
         virtual ~Event() {}
         virtual SkString toJson() const=0;
 
         const char* fName;
@@ skipping 26 matching lines @@
 #define GR_AUDIT_TRAIL_AUTO_FRAME(audit_trail, framename) \
     GrAuditTrail::AutoFrame SK_MACRO_APPEND_LINE(auto_frame)(audit_trail, framename);
 
 #define GR_AUDIT_TRAIL_RESET(audit_trail) \
     GR_AUDIT_TRAIL_INVOKE_GUARD(audit_trail->reset);
 
 #define GR_AUDIT_TRAIL_ADDBATCH(audit_trail, batchname, bounds) \
     GR_AUDIT_TRAIL_INVOKE_GUARD(audit_trail->addBatch, batchname, bounds);
 
 #endif