teach dump_record to recurse into subpictures

tools/DumpRecord.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include <stdio.h>
 
 #include "SkRecord.h"
@@ skipping 42 matching lines @@
     void print(const SkRecords::Save& command, double ns) {
         this->printNameAndTime(command, ns);
         ++fIndent;
     }
 
     void print(const SkRecords::SaveLayer& command, double ns) {
         this->printNameAndTime(command, ns);
         ++fIndent;
     }
 
+    void print(const SkRecords::DrawPicture& command, double ns) {
+        this->printNameAndTime(command, ns);
+
+        if (auto bp = command.picture->asSkBigPicture()) {
+            ++fIndent;
+
+            const SkRecord& record = *bp->record();
+            for (int i = 0; i < record.count(); i++) {
+                record.visit<void>(i, *this);
+            }
+
+            --fIndent;
+        }
+    }
+
 private:
     template <typename T>
     void printNameAndTime(const T& command, double ns) {
         int us = (int)(ns * 1e-3);
         if (!fTimeWithCommand) {
             printf("%6dus  ", us);
         }
         printf("%*d ", fDigits, fIndex++);
         for (int i = 0; i < fIndent; i++) {
             printf("    ");
@@ skipping 27 matching lines @@
 }  // namespace
 
 void DumpRecord(const SkRecord& record,
                   SkCanvas* canvas,
                   bool timeWithCommand) {
     Dumper dumper(canvas, record.count(), timeWithCommand);
     for (int i = 0; i < record.count(); i++) {
         record.visit<void>(i, dumper);
     }
 }