DO NOT MERGE Don't leak `this` out of GraphicBufferSource ctor am: ebeb47000d am: afa728e0b7 am: 63f4d38b3e am: 19b6a74a9d  -s ours am: 9b2197958f
am: c50cf9d602

Change-Id: I68b8517da95e6d1761bcd7866bfc31ee4ebb1a78