GTK: Fix a bookmark dragging crasher by initing a member var.
GTK: Fix a bookmark dragging crasher by initing a member var.

Not sure when this regressed. Looking at the svn history I can't even find a revision where it would have worked. We probably made some other change that revealed this long-standing bug.

BUG=23233
TEST=drag a bookmark out of a bookmark bar folder

Review URL: http://codereview.chromium.org/255011

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@27550 0039d316-1c4b-4281-b951-d872f2087c98

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