split SkPictureRecorder out of SkPicture

src/image/SkImage_Picture.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkImage_Base.h"
 #include "SkImagePriv.h"
 #include "SkPicture.h"
@@ skipping 10 matching lines @@
 
 private:
     SkPicture*  fPicture;
 
     typedef SkImage_Base INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 SkImage_Picture::SkImage_Picture(SkPicture* pict) : INHERITED(pict->width(), pict->height()) {
-    pict->endRecording();
+    pict->endRecording();   // TODO: remove eventually
     pict->ref();
     fPicture = pict;
 }
 
 SkImage_Picture::~SkImage_Picture() {
     fPicture->unref();
 }
 
 void SkImage_Picture::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y,
                              const SkPaint* paint) {
@@ skipping 15 matching lines @@
      *  needs to mutate them later on.
      */
     SkAutoTUnref<SkPicture> playback(SkNEW_ARGS(SkPicture, (*srcPicture)));
 
     return SkNEW_ARGS(SkImage_Picture, (playback));
 }
 
 SkPicture* SkPictureImageGetPicture(SkImage* pictureImage) {
     return static_cast<SkImage_Picture*>(pictureImage)->getPicture();
 }