Delay starting NetworkChangeNotifierWin's DNS configuration-watching thread until WatchForAddressChangeInternal() for two reasons: 1. We shouldn't be doing work like this in the constructor. 2. This places more stress on the racy uses of g_network_change_notifier    which may be leading to crashes during unit-testing when we quickly    setup and then shutdown the NetworkChangeNotifierWin.  The unit-tests    mock out WatchForAddressChangeInternal().  We don't want the    unit-tests watching for real address changes.
Delay starting NetworkChangeNotifierWin's DNS configuration-watching
thread until WatchForAddressChangeInternal() for two reasons:
1. We shouldn't be doing work like this in the constructor.
2. This places more stress on the racy uses of g_network_change_notifier
   which may be leading to crashes during unit-testing when we quickly
   setup and then shutdown the NetworkChangeNotifierWin.  The unit-tests
   mock out WatchForAddressChangeInternal().  We don't want the
   unit-tests watching for real address changes.

BUG=356401

Review URL: https://codereview.chromium.org/225623006

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@262496 0039d316-1c4b-4281-b951-d872f2087c98

dednal/chromium.src,axinging/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,hgl888/chromium-crosswalk-efl,ondra-novak/chromium.src,mohamed--abdel-maksoud/chromium.src,Chilledheart/chromium,dednal/chromium.src,hgl888/chromium-crosswalk-efl,TheTypoMaster/chromium-crosswalk,M4sse/chromium.src,PeterWangIntel/chromium-crosswalk,fujunwei/chromium-crosswalk,hgl888/chromium-crosswalk-efl,dushu1203/chromium.src,krieger-od/nwjs_chromium.src,bright-sparks/chromium-spacewalk,ltilve/chromium,Chilledheart/chromium,M4sse/chromium.src,bright-sparks/chromium-spacewalk,markYoungH/chromium.src,markYoungH/chromium.src,bright-sparks/chromium-spacewalk,bright-sparks/chromium-spacewalk,hgl888/chromium-crosswalk-efl,Jonekee/chromium.src,fujunwei/chromium-crosswalk,Pluto-tv/chromium-crosswalk,littlstar/chromium.src,M4sse/chromium.src,hgl888/chromium-crosswalk,dednal/chromium.src,hgl888/chromium-crosswalk,M4sse/chromium.src,dushu1203/chromium.src,M4sse/chromium.src,Just-D/chromium-1,krieger-od/nwjs_chromium.src,axinging/chromium-crosswalk,Just-D/chromium-1,axinging/chromium-crosswalk,krieger-od/nwjs_chromium.src,bright-sparks/chromium-spacewalk,fujunwei/chromium-crosswalk,Jonekee/chromium.src,dednal/chromium.src,ltilve/chromium,axinging/chromium-crosswalk,jaruba/chromium.src,axinging/chromium-crosswalk,littlstar/chromium.src,mohamed--abdel-maksoud/chromium.src,hgl888/chromium-crosswalk-efl,jaruba/chromium.src,hgl888/chromium-crosswalk-efl,crosswalk-project/chromium-crosswalk-efl,mohamed--abdel-maksoud/chromium.src,Pluto-tv/chromium-crosswalk,markYoungH/chromium.src,Jonekee/chromium.src,mohamed--abdel-maksoud/chromium.src,PeterWangIntel/chromium-crosswalk,Fireblend/chromium-crosswalk,Jonekee/chromium.src,dednal/chromium.src,littlstar/chromium.src,chuan9/chromium-crosswalk,krieger-od/nwjs_chromium.src,TheTypoMaster/chromium-crosswalk,jaruba/chromium.src,Jonekee/chromium.src,bright-sparks/chromium-spacewalk,Just-D/chromium-1,dushu1203/chromium.src,dednal/chromium.src,Chilledheart/chromium,hgl888/chromium-crosswalk,fujunwei/chromium-crosswalk,chuan9/chromium-crosswalk,Pluto-tv/chromium-crosswalk,chuan9/chromium-crosswalk,chuan9/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,hgl888/chromium-crosswalk,dushu1203/chromium.src,ltilve/chromium,bright-sparks/chromium-spacewalk,markYoungH/chromium.src,Pluto-tv/chromium-crosswalk,ltilve/chromium,chuan9/chromium-crosswalk,ondra-novak/chromium.src,krieger-od/nwjs_chromium.src,mohamed--abdel-maksoud/chromium.src,markYoungH/chromium.src,hgl888/chromium-crosswalk-efl,hgl888/chromium-crosswalk-efl,PeterWangIntel/chromium-crosswalk,krieger-od/nwjs_chromium.src,TheTypoMaster/chromium-crosswalk,ondra-novak/chromium.src,littlstar/chromium.src,Just-D/chromium-1,Just-D/chromium-1,PeterWangIntel/chromium-crosswalk,Just-D/chromium-1,Pluto-tv/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,dednal/chromium.src,ondra-novak/chromium.src,jaruba/chromium.src,ltilve/chromium,Fireblend/chromium-crosswalk,Chilledheart/chromium,crosswalk-project/chromium-crosswalk-efl,Chilledheart/chromium,dushu1203/chromium.src,Chilledheart/chromium,Jonekee/chromium.src,M4sse/chromium.src,krieger-od/nwjs_chromium.src,mohamed--abdel-maksoud/chromium.src,Fireblend/chromium-crosswalk,dushu1203/chromium.src,chuan9/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,M4sse/chromium.src,Pluto-tv/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,ltilve/chromium,dushu1203/chromium.src,markYoungH/chromium.src,Just-D/chromium-1,PeterWangIntel/chromium-crosswalk,fujunwei/chromium-crosswalk,fujunwei/chromium-crosswalk,hgl888/chromium-crosswalk,crosswalk-project/chromium-crosswalk-efl,ltilve/chromium,markYoungH/chromium.src,hgl888/chromium-crosswalk-efl,crosswalk-project/chromium-crosswalk-efl,crosswalk-project/chromium-crosswalk-efl,fujunwei/chromium-crosswalk,markYoungH/chromium.src,markYoungH/chromium.src,Pluto-tv/chromium-crosswalk,M4sse/chromium.src,TheTypoMaster/chromium-crosswalk,ltilve/chromium,jaruba/chromium.src,chuan9/chromium-crosswalk,littlstar/chromium.src,hgl888/chromium-crosswalk-efl,jaruba/chromium.src,chuan9/chromium-crosswalk,dednal/chromium.src,krieger-od/nwjs_chromium.src,ondra-novak/chromium.src,TheTypoMaster/chromium-crosswalk,hgl888/chromium-crosswalk,fujunwei/chromium-crosswalk,jaruba/chromium.src,dednal/chromium.src,hgl888/chromium-crosswalk,fujunwei/chromium-crosswalk,Fireblend/chromium-crosswalk,Just-D/chromium-1,Pluto-tv/chromium-crosswalk,Fireblend/chromium-crosswalk,Jonekee/chromium.src,hgl888/chromium-crosswalk,ondra-novak/chromium.src,crosswalk-project/chromium-crosswalk-efl,PeterWangIntel/chromium-crosswalk,Pluto-tv/chromium-crosswalk,axinging/chromium-crosswalk,Fireblend/chromium-crosswalk,Jonekee/chromium.src,axinging/chromium-crosswalk,ondra-novak/chromium.src,markYoungH/chromium.src,Jonekee/chromium.src,crosswalk-project/chromium-crosswalk-efl,chuan9/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,Fireblend/chromium-crosswalk,Fireblend/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,Chilledheart/chromium,crosswalk-project/chromium-crosswalk-efl,Chilledheart/chromium,PeterWangIntel/chromium-crosswalk,dushu1203/chromium.src,bright-sparks/chromium-spacewalk,krieger-od/nwjs_chromium.src,ltilve/chromium,markYoungH/chromium.src,dushu1203/chromium.src,dednal/chromium.src,jaruba/chromium.src,mohamed--abdel-maksoud/chromium.src,littlstar/chromium.src,M4sse/chromium.src,Fireblend/chromium-crosswalk,Jonekee/chromium.src,littlstar/chromium.src,jaruba/chromium.src,axinging/chromium-crosswalk,axinging/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,PeterWangIntel/chromium-crosswalk,bright-sparks/chromium-spacewalk,jaruba/chromium.src,Chilledheart/chromium,dushu1203/chromium.src,axinging/chromium-crosswalk,axinging/chromium-crosswalk,dushu1203/chromium.src,jaruba/chromium.src,M4sse/chromium.src,ondra-novak/chromium.src,littlstar/chromium.src,Jonekee/chromium.src,Just-D/chromium-1,M4sse/chromium.src,hgl888/chromium-crosswalk,dednal/chromium.src,krieger-od/nwjs_chromium.src,krieger-od/nwjs_chromium.src,crosswalk-project/chromium-crosswalk-efl,TheTypoMaster/chromium-crosswalk,ondra-novak/chromium.src