Ignore generated files.

Change-Id: I6f70aa77601948b4b9474a87c781d34130fa2301
WS

Change-Id: I354c4fcbd97a40c8f34fd4a3f49c8ee7b04a174d
Ignore editor generated files.

Change-Id: I33aa5bd0c5d77ed7f2e8c4e460221c028cae4d8d
Remove unused variable.

Change-Id: I82fd03d265c2e18f3fe7c7704bc6a38b060865bf
Use correct type for VolumeChanged argument.

Change-Id: I20677151ad001be6f9632b2c0e34769585e7621a