Change SkPicture::draw to playback

R=reed@google.com

Author: robertphillips@google.com

Review URL: https://codereview.chromium.org/540963002
diff --git a/samplecode/SampleApp.cpp b/samplecode/SampleApp.cpp
index e8d6d99..9c9b343 100644
--- a/samplecode/SampleApp.cpp
+++ b/samplecode/SampleApp.cpp
@@ -1376,7 +1376,7 @@
                 orig->drawPicture(pict.get());
             }
         } else {
-            picture->draw(orig);
+            picture->playback(orig);
         }
     }