add replay entry point to SkPictureRecorder for Android

include/core/SkPictureRecorder.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkPictureRecorder_DEFINED
 #define SkPictureRecorder_DEFINED
 
@@ skipping 81 matching lines @@
         if (NULL != fPicture.get()) {
             fPicture->internalOnly_EnableOpts(enableOpts);
         }
     }
 
 private:
 #ifdef SK_SUPPORT_LEGACY_DERIVED_PICTURE_CLASSES
     SkAutoTUnref<SkPictureFactory>  fFactory;
 #endif
 
+#ifdef SK_BUILD_FOR_ANDROID
+    /** Replay the current (partially recorded) operation stream into
+        canvas. This call doesn't close the current recording.
+    */
+    friend class AndroidPicture;
+    friend class SkPictureRecorderReplayTester; // for unit testing
+    void partialReplay(SkCanvas* canvas);
+#endif
+
     SkAutoTUnref<SkPicture>         fPicture;
 
     typedef SkNoncopyable INHERITED;
 };
 
 #endif