add replay entry point to SkPictureRecorder for Android

src/core/SkPictureRecorder.cpp

Index: src/core/SkPictureRecorder.cpp
diff --git a/src/core/SkPictureRecorder.cpp b/src/core/SkPictureRecorder.cpp
index a22cf5df145637021cbf918577a3381cf1501356..844b0e765b8bba8e937ee2834837492817ad2c1d 100644
--- a/src/core/SkPictureRecorder.cpp
+++ b/src/core/SkPictureRecorder.cpp
@@ -5,6 +5,9 @@
  * found in the LICENSE file.
  */
 
+#ifdef SK_BUILD_FOR_ANDROID
+#include "SkPicturePlayback.h"
+#endif
 #include "SkPictureRecorder.h"
 
 SkCanvas* SkPictureRecorder::beginRecording(int width, int height,
@@ -13,3 +16,19 @@ SkCanvas* SkPictureRecorder::beginRecording(int width, int height,
     fPicture.reset(SkNEW(SkPicture));
     return fPicture->beginRecording(width, height, bbhFactory, recordFlags);
 }
+
+#ifdef SK_BUILD_FOR_ANDROID
+void SkPictureRecorder::partialReplay(SkCanvas* canvas) {
+    if (NULL == fPicture.get() || NULL == canvas) {
+        // Not recording or nothing to replay into
+        return;
+    }
+
+    SkASSERT(NULL != fPicture->fRecord);
+
+    SkAutoTDelete<SkPicturePlayback> playback(SkPicture::FakeEndRecording(fPicture,
+                                                                          *fPicture->fRecord,
+                                                                          false));
+    playback->draw(*canvas, NULL);
+}
+#endif