Change SkPicture::draw to playback

R=reed@google.com

Author: robertphillips@google.com

Review URL: https://codereview.chromium.org/540963002
diff --git a/samplecode/SampleAll.cpp b/samplecode/SampleAll.cpp
index 395314c..19e692f 100644
--- a/samplecode/SampleAll.cpp
+++ b/samplecode/SampleAll.cpp
@@ -322,7 +322,7 @@
             do {
                 canvas->save();
                 canvas->clipRect(clip);
-                picture->draw(canvas);
+                picture->playback(canvas);
                 canvas->restore();
                 if (clip.fRight < SkIntToScalar(320))
                     clip.offset(SkIntToScalar(160), 0);