GApplication: don't create a mainloop
GApplication: don't create a mainloop

Just iterate the main context directly.  Also: avoid calling the virtual
functions for mainloops.

https://bugzilla.gnome.org/show_bug.cgi?id=658805

endlessm/glib,Distrotech/glib,tchakabam/glib,ieei/glib,cosimoc/glib,pstglia/external-bluetooth-glib,johne53/MB3Glib,Distrotech/glib,cention-sany/glib,mzabaluev/glib,pstglia/platform-external-bluetooth-glib,lukasz-skalski/glib,darren-clark/android_platform_external_bluetooth_glib,01org/android-bluez-glib,lukasz-skalski/glib,cosimoc/glib,iConsole/Console-OS_external_bluetooth_glib,cention-sany/glib,Distrotech/glib,darren-clark/android_platform_external_bluetooth_glib,endlessm/glib,antono/glib,01org/android-bluez-glib,lukasz-skalski/glib,ieei/glib,tamaskenez/glib,bluez-android/glib,endlessm/glib,lukasz-skalski/glib,djdeath/glib,ieei/glib,01org/android-bluez-glib,cosimoc/glib,justinkb/aosp-bluez.glib,gale320/glib,justinkb/aosp-bluez.glib,MathieuDuponchelle/glib,johne53/MB3Glib,bluez-android/glib,antono/glib,iConsole/Console-OS_external_bluetooth_glib,pstglia/platform-external-bluetooth-glib,darren-clark/android_platform_external_bluetooth_glib,MathieuDuponchelle/glib,antono/glib,pstglia/external-bluetooth-glib,endlessm/glib,pstglia/external-bluetooth-glib,djdeath/glib,pstglia/platform-external-bluetooth-glib,cosimoc/glib,krichter722/glib,iConsole/Console-OS_external_bluetooth_glib,mzabaluev/glib,justinkb/aosp-bluez.glib,antono/glib,tchakabam/glib,lukasz-skalski/glib,iConsole/Console-OS_external_bluetooth_glib,mzabaluev/glib,ieei/glib,tchakabam/glib,cention-sany/glib,bluez-android/glib,gale320/glib,cosimoc/glib,MathieuDuponchelle/glib,darren-clark/android_platform_external_bluetooth_glib,djdeath/glib,mzabaluev/glib,johne53/MB3Glib,krichter722/glib,pstglia/external-bluetooth-glib,djdeath/glib,djdeath/glib,krichter722/glib,MathieuDuponchelle/glib,krichter722/glib,cention-sany/glib,pstglia/platform-external-bluetooth-glib,iConsole/Console-OS_external_bluetooth_glib,justinkb/aosp-bluez.glib,ieei/glib,01org/android-bluez-glib,pstglia/platform-external-bluetooth-glib,tamaskenez/glib,bluez-android/glib,MathieuDuponchelle/glib,johne53/MB3Glib,01org/android-bluez-glib,darren-clark/android_platform_external_bluetooth_glib,endlessm/glib,Distrotech/glib,mzabaluev/glib,tamaskenez/glib,Distrotech/glib,johne53/MB3Glib,cention-sany/glib,gale320/glib,pstglia/external-bluetooth-glib,krichter722/glib,tamaskenez/glib,bluez-android/glib,tchakabam/glib,justinkb/aosp-bluez.glib,gale320/glib,johne53/MB3Glib,gale320/glib,tchakabam/glib,tamaskenez/glib