Thread through a flag to force SkPicture::playback() when recording subpictures.

src/core/SkRecorder.h

Index: src/core/SkRecorder.h
diff --git a/src/core/SkRecorder.h b/src/core/SkRecorder.h
index 3809ae239d059d015a60cbcc7e6f89aa7e12619e..688069bd502ef98b3ab3c3c8a5aca3e40c1d356f 100644
--- a/src/core/SkRecorder.h
+++ b/src/core/SkRecorder.h
@@ -41,7 +41,8 @@ public:
     SkRecorder(SkRecord*, int width, int height, SkMiniRecorder* = nullptr);   // legacy version
     SkRecorder(SkRecord*, const SkRect& bounds, SkMiniRecorder* = nullptr);
 
-    void reset(SkRecord*, const SkRect& bounds, SkMiniRecorder* = nullptr);
+    enum DrawPictureMode { Record_DrawPictureMode, Playback_DrawPictureMode };
+    void reset(SkRecord*, const SkRect& bounds, DrawPictureMode, SkMiniRecorder* = nullptr);
 
     size_t approxBytesUsedBySubPictures() const { return fApproxBytesUsedBySubPictures; }
 
@@ -137,6 +138,7 @@ private:
         return devBounds;
     }
 
+    DrawPictureMode fDrawPictureMode;
     size_t fApproxBytesUsedBySubPictures;
     SkRecord* fRecord;
     SkAutoTDelete<SkDrawableList> fDrawableList;