Fix "Object has been destroyed" error in "page-title-updated" event
Fix "Object has been destroyed" error in "page-title-updated" event

Close #4249.

leethomas/electron,kcrt/electron,Evercoder/electron,miniak/electron,voidbridge/electron,brenca/electron,biblerule/UMCTelnetHub,gerhardberger/electron,Gerhut/electron,aliib/electron,electron/electron,noikiy/electron,shiftkey/electron,MaxWhere/electron,minggo/electron,ankitaggarwal011/electron,the-ress/electron,kcrt/electron,thompsonemerson/electron,voidbridge/electron,gerhardberger/electron,kokdemo/electron,thompsonemerson/electron,joaomoreno/atom-shell,brave/muon,twolfson/electron,jhen0409/electron,rajatsingla28/electron,gabriel/electron,miniak/electron,leethomas/electron,electron/electron,pombredanne/electron,biblerule/UMCTelnetHub,kokdemo/electron,Evercoder/electron,joaomoreno/atom-shell,bpasero/electron,leethomas/electron,kokdemo/electron,tinydew4/electron,MaxWhere/electron,posix4e/electron,Floato/electron,simongregory/electron,brave/electron,stevekinney/electron,dongjoon-hyun/electron,minggo/electron,thompsonemerson/electron,brave/muon,tinydew4/electron,MaxWhere/electron,Floato/electron,tonyganch/electron,bpasero/electron,bpasero/electron,Gerhut/electron,ankitaggarwal011/electron,stevekinney/electron,brave/muon,rreimann/electron,bpasero/electron,rajatsingla28/electron,biblerule/UMCTelnetHub,simongregory/electron,felixrieseberg/electron,Gerhut/electron,gabriel/electron,preco21/electron,rreimann/electron,kokdemo/electron,felixrieseberg/electron,thomsonreuters/electron,leethomas/electron,shiftkey/electron,the-ress/electron,tinydew4/electron,bbondy/electron,minggo/electron,thomsonreuters/electron,tinydew4/electron,posix4e/electron,brave/muon,gabriel/electron,kcrt/electron,aichingm/electron,miniak/electron,voidbridge/electron,deed02392/electron,jhen0409/electron,tinydew4/electron,bpasero/electron,aichingm/electron,kcrt/electron,rreimann/electron,Evercoder/electron,posix4e/electron,wan-qy/electron,biblerule/UMCTelnetHub,voidbridge/electron,aliib/electron,preco21/electron,renaesop/electron,Evercoder/electron,rajatsingla28/electron,twolfson/electron,wan-qy/electron,wan-qy/electron,bbondy/electron,tonyganch/electron,electron/electron,ankitaggarwal011/electron,posix4e/electron,seanchas116/electron,wan-qy/electron,kokdemo/electron,electron/electron,rreimann/electron,thompsonemerson/electron,gerhardberger/electron,Gerhut/electron,gerhardberger/electron,deed02392/electron,noikiy/electron,pombredanne/electron,simongregory/electron,stevekinney/electron,thomsonreuters/electron,dongjoon-hyun/electron,simongregory/electron,aichingm/electron,deed02392/electron,deed02392/electron,stevekinney/electron,Gerhut/electron,kcrt/electron,simongregory/electron,twolfson/electron,miniak/electron,gerhardberger/electron,felixrieseberg/electron,biblerule/UMCTelnetHub,miniak/electron,preco21/electron,twolfson/electron,tonyganch/electron,bbondy/electron,brave/electron,renaesop/electron,ankitaggarwal011/electron,the-ress/electron,aichingm/electron,dongjoon-hyun/electron,Evercoder/electron,aliib/electron,leethomas/electron,Floato/electron,noikiy/electron,MaxWhere/electron,miniak/electron,seanchas116/electron,Gerhut/electron,gerhardberger/electron,posix4e/electron,rajatsingla28/electron,Floato/electron,felixrieseberg/electron,seanchas116/electron,jhen0409/electron,felixrieseberg/electron,aliib/electron,thompsonemerson/electron,deed02392/electron,ankitaggarwal011/electron,shiftkey/electron,tinydew4/electron,bpasero/electron,thompsonemerson/electron,joaomoreno/atom-shell,thomsonreuters/electron,noikiy/electron,brave/electron,brave/electron,Floato/electron,brave/muon,ankitaggarwal011/electron,tonyganch/electron,posix4e/electron,voidbridge/electron,bpasero/electron,shiftkey/electron,thomsonreuters/electron,wan-qy/electron,electron/electron,MaxWhere/electron,dongjoon-hyun/electron,kcrt/electron,bbondy/electron,noikiy/electron,renaesop/electron,thomsonreuters/electron,aliib/electron,noikiy/electron,rajatsingla28/electron,dongjoon-hyun/electron,stevekinney/electron,brave/muon,bbondy/electron,brenca/electron,brenca/electron,joaomoreno/atom-shell,MaxWhere/electron,minggo/electron,seanchas116/electron,dongjoon-hyun/electron,pombredanne/electron,gabriel/electron,preco21/electron,leethomas/electron,the-ress/electron,jhen0409/electron,brenca/electron,tonyganch/electron,preco21/electron,kokdemo/electron,brenca/electron,gabriel/electron,rreimann/electron,jhen0409/electron,wan-qy/electron,minggo/electron,renaesop/electron,shiftkey/electron,Evercoder/electron,brave/electron,twolfson/electron,stevekinney/electron,brave/electron,jhen0409/electron,pombredanne/electron,aichingm/electron,voidbridge/electron,renaesop/electron,the-ress/electron,pombredanne/electron,gerhardberger/electron,joaomoreno/atom-shell,simongregory/electron,electron/electron,seanchas116/electron,renaesop/electron,the-ress/electron,gabriel/electron,rreimann/electron,felixrieseberg/electron,bbondy/electron,Floato/electron,the-ress/electron,deed02392/electron,twolfson/electron,electron/electron,joaomoreno/atom-shell,rajatsingla28/electron,shiftkey/electron,seanchas116/electron,biblerule/UMCTelnetHub,preco21/electron,aliib/electron,aichingm/electron,minggo/electron,tonyganch/electron,brenca/electron,pombredanne/electron