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
am: 1aa5d1c703

Change-Id: Ib096b52833b81d193dac1fb22e4186245febb5ab