Only show the "bookmarks go here" text after we have loaded the bookmark model.  This prevents a "flash" of the text between startp and model load (when model is not empty).
Only show the "bookmarks go here" text after we have loaded the
bookmark model.  This prevents a "flash" of the text between startp
and model load (when model is not empty).

BookmarkBarToolbarView nib change:
The "width based tweaker" object (that contains the "Bookmarks go
here" text shown when you have no bookmarks) defaults to NOT
visible.  

BUG=http://crbug.com/43102

TEST=New profile.  Launch chrome.  Make sure you see the "bookmarks go here" text.
Add a bookmark; make sure text goes away.
Delete it; text comes back.
Add a bookmark; text goes away again.  
Restart Chrome a dozen times.  Make sure you never see the text, even for a flash.


Review URL: http://codereview.chromium.org/2825012

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@50366 0039d316-1c4b-4281-b951-d872f2087c98

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