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 am: 1a8358e06a am: af8e0b2c1e  -s ours am: 758e62457c
am: c78fd0388a

Change-Id: I47e7a5c5b807ecb6a036761f99152494c93119bb