Revert 179101 - It caused first-run issues.
Revert 179101 - It caused first-run issues.

Original CL description:

bookmarks: Convert ProfileImpl to use BaseBookmarkModelObserver.

That way we can remove the usage of chrome::NOTIFICATION_BOOKMARK_MODEL_LOADED,
and just register it using BookmarkModel::AddObserver/RemoveObserver API.

BUG=144783
R=sky@chromium.org,sail@chromium.org

Review URL: https://chromiumcodereview.appspot.com/12077006

BUG=174590
TBR=sail@chromium.org,tapted@chromium.org,tfarina@chromium.org

Review URL: https://codereview.chromium.org/12209055

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@181306 0039d316-1c4b-4281-b951-d872f2087c98

crosswalk-project/chromium-crosswalk-efl,axinging/chromium-crosswalk,dushu1203/chromium.src,Fireblend/chromium-crosswalk,markYoungH/chromium.src,dednal/chromium.src,hgl888/chromium-crosswalk-efl,timopulkkinen/BubbleFish,dushu1203/chromium.src,pozdnyakov/chromium-crosswalk,ondra-novak/chromium.src,anirudhSK/chromium,dednal/chromium.src,jaruba/chromium.src,krieger-od/nwjs_chromium.src,Jonekee/chromium.src,Jonekee/chromium.src,Jonekee/chromium.src,dushu1203/chromium.src,Fireblend/chromium-crosswalk,krieger-od/nwjs_chromium.src,mogoweb/chromium-crosswalk,hgl888/chromium-crosswalk,hujiajie/pa-chromium,pozdnyakov/chromium-crosswalk,chuan9/chromium-crosswalk,mogoweb/chromium-crosswalk,patrickm/chromium.src,ltilve/chromium,Pluto-tv/chromium-crosswalk,fujunwei/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,axinging/chromium-crosswalk,chuan9/chromium-crosswalk,M4sse/chromium.src,timopulkkinen/BubbleFish,Chilledheart/chromium,anirudhSK/chromium,PeterWangIntel/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,dednal/chromium.src,Fireblend/chromium-crosswalk,crosswalk-project/chromium-crosswalk-efl,hujiajie/pa-chromium,crosswalk-project/chromium-crosswalk-efl,hgl888/chromium-crosswalk,markYoungH/chromium.src,hgl888/chromium-crosswalk,mogoweb/chromium-crosswalk,krieger-od/nwjs_chromium.src,chuan9/chromium-crosswalk,axinging/chromium-crosswalk,Chilledheart/chromium,jaruba/chromium.src,crosswalk-project/chromium-crosswalk-efl,Just-D/chromium-1,anirudhSK/chromium,timopulkkinen/BubbleFish,axinging/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,Jonekee/chromium.src,crosswalk-project/chromium-crosswalk-efl,crosswalk-project/chromium-crosswalk-efl,pozdnyakov/chromium-crosswalk,M4sse/chromium.src,TheTypoMaster/chromium-crosswalk,bright-sparks/chromium-spacewalk,anirudhSK/chromium,ondra-novak/chromium.src,hujiajie/pa-chromium,TheTypoMaster/chromium-crosswalk,hgl888/chromium-crosswalk-efl,dednal/chromium.src,timopulkkinen/BubbleFish,krieger-od/nwjs_chromium.src,anirudhSK/chromium,markYoungH/chromium.src,Pluto-tv/chromium-crosswalk,fujunwei/chromium-crosswalk,Pluto-tv/chromium-crosswalk,zcbenz/cefode-chromium,M4sse/chromium.src,Just-D/chromium-1,patrickm/chromium.src,ChromiumWebApps/chromium,Jonekee/chromium.src,littlstar/chromium.src,ondra-novak/chromium.src,ChromiumWebApps/chromium,mohamed--abdel-maksoud/chromium.src,zcbenz/cefode-chromium,patrickm/chromium.src,dednal/chromium.src,hgl888/chromium-crosswalk-efl,patrickm/chromium.src,fujunwei/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,ChromiumWebApps/chromium,Chilledheart/chromium,mogoweb/chromium-crosswalk,dednal/chromium.src,zcbenz/cefode-chromium,mogoweb/chromium-crosswalk,ltilve/chromium,jaruba/chromium.src,PeterWangIntel/chromium-crosswalk,hgl888/chromium-crosswalk-efl,pozdnyakov/chromium-crosswalk,pozdnyakov/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,pozdnyakov/chromium-crosswalk,pozdnyakov/chromium-crosswalk,bright-sparks/chromium-spacewalk,fujunwei/chromium-crosswalk,axinging/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,Fireblend/chromium-crosswalk,timopulkkinen/BubbleFish,krieger-od/nwjs_chromium.src,patrickm/chromium.src,axinging/chromium-crosswalk,M4sse/chromium.src,dednal/chromium.src,ondra-novak/chromium.src,mohamed--abdel-maksoud/chromium.src,bright-sparks/chromium-spacewalk,patrickm/chromium.src,littlstar/chromium.src,Fireblend/chromium-crosswalk,Chilledheart/chromium,Just-D/chromium-1,anirudhSK/chromium,timopulkkinen/BubbleFish,PeterWangIntel/chromium-crosswalk,axinging/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,M4sse/chromium.src,krieger-od/nwjs_chromium.src,Fireblend/chromium-crosswalk,timopulkkinen/BubbleFish,jaruba/chromium.src,timopulkkinen/BubbleFish,jaruba/chromium.src,Pluto-tv/chromium-crosswalk,hgl888/chromium-crosswalk,M4sse/chromium.src,ChromiumWebApps/chromium,bright-sparks/chromium-spacewalk,crosswalk-project/chromium-crosswalk-efl,ltilve/chromium,Just-D/chromium-1,fujunwei/chromium-crosswalk,timopulkkinen/BubbleFish,hujiajie/pa-chromium,Just-D/chromium-1,littlstar/chromium.src,dednal/chromium.src,dushu1203/chromium.src,markYoungH/chromium.src,krieger-od/nwjs_chromium.src,chuan9/chromium-crosswalk,hgl888/chromium-crosswalk-efl,markYoungH/chromium.src,Fireblend/chromium-crosswalk,dednal/chromium.src,mogoweb/chromium-crosswalk,dushu1203/chromium.src,Jonekee/chromium.src,chuan9/chromium-crosswalk,fujunwei/chromium-crosswalk,ChromiumWebApps/chromium,PeterWangIntel/chromium-crosswalk,jaruba/chromium.src,ChromiumWebApps/chromium,pozdnyakov/chromium-crosswalk,krieger-od/nwjs_chromium.src,ondra-novak/chromium.src,hujiajie/pa-chromium,hgl888/chromium-crosswalk-efl,M4sse/chromium.src,hujiajie/pa-chromium,ChromiumWebApps/chromium,ondra-novak/chromium.src,hujiajie/pa-chromium,Chilledheart/chromium,fujunwei/chromium-crosswalk,anirudhSK/chromium,Just-D/chromium-1,crosswalk-project/chromium-crosswalk-efl,littlstar/chromium.src,Jonekee/chromium.src,mohamed--abdel-maksoud/chromium.src,M4sse/chromium.src,ltilve/chromium,hgl888/chromium-crosswalk,hgl888/chromium-crosswalk,Pluto-tv/chromium-crosswalk,dednal/chromium.src,anirudhSK/chromium,markYoungH/chromium.src,Jonekee/chromium.src,pozdnyakov/chromium-crosswalk,dushu1203/chromium.src,zcbenz/cefode-chromium,M4sse/chromium.src,jaruba/chromium.src,bright-sparks/chromium-spacewalk,jaruba/chromium.src,dushu1203/chromium.src,TheTypoMaster/chromium-crosswalk,Pluto-tv/chromium-crosswalk,Fireblend/chromium-crosswalk,patrickm/chromium.src,ondra-novak/chromium.src,markYoungH/chromium.src,Just-D/chromium-1,TheTypoMaster/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,markYoungH/chromium.src,Just-D/chromium-1,zcbenz/cefode-chromium,dushu1203/chromium.src,ondra-novak/chromium.src,hgl888/chromium-crosswalk-efl,dushu1203/chromium.src,ChromiumWebApps/chromium,ltilve/chromium,hujiajie/pa-chromium,mogoweb/chromium-crosswalk,chuan9/chromium-crosswalk,pozdnyakov/chromium-crosswalk,ChromiumWebApps/chromium,Pluto-tv/chromium-crosswalk,ltilve/chromium,crosswalk-project/chromium-crosswalk-efl,ondra-novak/chromium.src,zcbenz/cefode-chromium,jaruba/chromium.src,ltilve/chromium,hgl888/chromium-crosswalk-efl,littlstar/chromium.src,mogoweb/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,krieger-od/nwjs_chromium.src,axinging/chromium-crosswalk,patrickm/chromium.src,axinging/chromium-crosswalk,hgl888/chromium-crosswalk,dushu1203/chromium.src,timopulkkinen/BubbleFish,Chilledheart/chromium,mohamed--abdel-maksoud/chromium.src,markYoungH/chromium.src,bright-sparks/chromium-spacewalk,axinging/chromium-crosswalk,dednal/chromium.src,Pluto-tv/chromium-crosswalk,zcbenz/cefode-chromium,Jonekee/chromium.src,littlstar/chromium.src,krieger-od/nwjs_chromium.src,hgl888/chromium-crosswalk,chuan9/chromium-crosswalk,ChromiumWebApps/chromium,anirudhSK/chromium,Jonekee/chromium.src,anirudhSK/chromium,bright-sparks/chromium-spacewalk,zcbenz/cefode-chromium,ChromiumWebApps/chromium,TheTypoMaster/chromium-crosswalk,hujiajie/pa-chromium,anirudhSK/chromium,mogoweb/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,Chilledheart/chromium,markYoungH/chromium.src,Jonekee/chromium.src,fujunwei/chromium-crosswalk,ltilve/chromium,zcbenz/cefode-chromium,Chilledheart/chromium,chuan9/chromium-crosswalk,dushu1203/chromium.src,M4sse/chromium.src,timopulkkinen/BubbleFish,hgl888/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,krieger-od/nwjs_chromium.src,TheTypoMaster/chromium-crosswalk,Chilledheart/chromium,littlstar/chromium.src,Pluto-tv/chromium-crosswalk,bright-sparks/chromium-spacewalk,hgl888/chromium-crosswalk-efl,axinging/chromium-crosswalk,chuan9/chromium-crosswalk,anirudhSK/chromium,mohamed--abdel-maksoud/chromium.src,littlstar/chromium.src,markYoungH/chromium.src,mogoweb/chromium-crosswalk,Fireblend/chromium-crosswalk,pozdnyakov/chromium-crosswalk,zcbenz/cefode-chromium,patrickm/chromium.src,mohamed--abdel-maksoud/chromium.src,Just-D/chromium-1,hujiajie/pa-chromium,jaruba/chromium.src,fujunwei/chromium-crosswalk,bright-sparks/chromium-spacewalk,zcbenz/cefode-chromium,ltilve/chromium,ChromiumWebApps/chromium,mohamed--abdel-maksoud/chromium.src,M4sse/chromium.src,hgl888/chromium-crosswalk-efl,jaruba/chromium.src,hujiajie/pa-chromium