split SkPictureRecorder out of SkPicture

dm/DMUtil.h

 #ifndef DMUtil_DEFINED
 #define DMUtil_DEFINED
 
 #include "SkBenchmark.h"
 #include "SkBitmap.h"
 #include "SkString.h"
 #include "gm_expectations.h"
 
+class SkPictureFactory;
+
 // Small free functions used in more than one place in DM.
 
 namespace DM {
 
 // UnderJoin("a", "b") -> "a_b"
 SkString UnderJoin(const char* a, const char* b);
 
-// Draw gm to picture.  Passes recordFlags to SkPicture::beginRecording().
-void RecordPicture(skiagm::GM* gm, SkPicture* picture, uint32_t recordFlags = 0);
+// Draw gm to picture.  Passes recordFlags to SkPictureRecorder::beginRecording().
+SkPicture* RecordPicture(skiagm::GM* gm, 
+                         uint32_t recordFlags = 0, 
+                         SkPictureFactory* factory = NULL);
 
 // Prepare bitmap to have gm or bench draw into it with this config.
 // TODO(mtklein): make SkBenchmark::getSize()/GM::getISize() const.
 void SetupBitmap(const SkColorType, skiagm::GM* gm, SkBitmap* bitmap);
 void SetupBitmap(const SkColorType, SkBenchmark* bench, SkBitmap* bitmap);
 
 // Draw picture to bitmap.
 void DrawPicture(SkPicture* picture, SkBitmap* bitmap);
 
 // Are these identical bitmaps?
 bool BitmapsEqual(const SkBitmap& a, const SkBitmap& b);
 
 }  // namespace DM
 
 #endif  // DMUtil_DEFINED