Macbook Pro not sleeping when left inactive with lid open My Macbook Pro Running 10.8.5 isn't sleeping when left alone. System prefs has everything set up to sleep but it isn't working. I used the command pmset -g assertions in terminal and I get 

Assertion status system-wide:
   PreventUserIdleDisplaySleep    0
   PreventSystemSleep             0
   PreventUserIdleSystemSleep     1
   InternalPreventDisplaySleep    0
   ExternalMedia                  0
   UserIsActive                   0
   ApplePushServiceTask           0
   BackgroundTask                 0

Listed by owning process:
  pid 386(Google Chrome): [0x000000010000021a] 22:54:00 NoIdleSleepAssertion named: "WebRTC has active PeerConnections." 
  pid 3791(helpd): [0x0000000c00000d34] 11:01:38 BackgroundTask named: 
"com.apple.helpd.sdmbuilding" 


So I'm assuming that this has to do with Google Chrome but I'm not sure what specifically. Anyone have any suggestions?
I resolved this problem. If anyone else runs into it in the future just go to chrome settings and then go to advanced settings and reset settings. It just brought me to default. Something in my settings was causing it. Honestly have no idea what it was.