ppb_core: rework ppb_core_call_on_browser_thread() operation
ppb_core: rework ppb_core_call_on_browser_thread() operation

Papapashu/freshplayerplugin,reuben/freshplayerplugin,Papapashu/freshplayerplugin,Papapashu/freshplayerplugin,reuben/freshplayerplugin,reuben/freshplayerplugin,grevutiu-gabriel/freshplayerplugin,grevutiu-gabriel/freshplayerplugin