Fix tab title fading direction in RTL locales.
Fix tab title fading direction in RTL locales.

BUG=134759, 134746
TEST=On Windows, launch chrome.exe with --lang=he and go to http://en.wikipedia.org/wiki/Main_Page. Observe that the text is faded on the right.
Open another tab and go to http://www.bbc.co.uk/arabic/topics/syria/ and observe that the text is faded on the left. Observe the same is true with LTR locales.

Review URL: https://chromiumcodereview.appspot.com/10689013

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@144791 0039d316-1c4b-4281-b951-d872f2087c98

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