wait for flush to finish before returning setSurface

Bug: 17187598
Change-Id: I091219e57158a4532044ca49342b57277d6ecb15
diff --git a/media/libmediaplayerservice/nuplayer/NuPlayer.cpp b/media/libmediaplayerservice/nuplayer/NuPlayer.cpp
index 0a9b65c..3dbc0a2 100644
--- a/media/libmediaplayerservice/nuplayer/NuPlayer.cpp
+++ b/media/libmediaplayerservice/nuplayer/NuPlayer.cpp
@@ -1732,6 +1732,13 @@
 
     // XXX - ignore error from setVideoScalingMode for now
     setVideoScalingMode(mVideoScalingMode);
+
+    if (mDriver != NULL) {
+        sp<NuPlayerDriver> driver = mDriver.promote();
+        if (driver != NULL) {
+            driver->notifySetSurfaceComplete();
+        }
+    }
 }
 
 void NuPlayer::onSourceNotify(const sp<AMessage> &msg) {