media: Refactor MediaCrypto creation and notification.

media/base/android/video_decoder_job.cc

Index: media/base/android/video_decoder_job.cc
diff --git a/media/base/android/video_decoder_job.cc b/media/base/android/video_decoder_job.cc
index d43f45039b1dc1a74cc283a867c1e7ea08ca65fc..cec1b39335376ec72a177ac822fa508952d8d3af 100644
--- a/media/base/android/video_decoder_job.cc
+++ b/media/base/android/video_decoder_job.cc
@@ -136,7 +136,7 @@ MediaDecoderJob::MediaDecoderJobStatus
 
   media_codec_bridge_.reset(VideoCodecBridge::CreateDecoder(
       video_codec_, is_secure, gfx::Size(config_width_, config_height_),
-      surface_.j_surface().obj(), GetMediaCrypto().obj()));
+      surface_.j_surface().obj(), GetMediaCrypto()));
 
   if (!media_codec_bridge_)
     return STATUS_FAILURE;