linux: Fix sort order in the task maanger.
linux: Fix sort order in the task maanger.

In Linux, the sort ordering in the task manager is incorrect, as in when you
click on a column header to sort the values the first time, it shows a triangle
with the pointy head downwards, i.e. it should show the values from larger to
smaller. But currently, the values are shown smaller to larger. So this small
patch is a fix for that. This is also consistent with the behaviour on Windows.

Also, this makes more sense. When a user is sorting, for example, the memory or
the cpu column, it is more likely he is interested on the pages that are taking
the most memory/cpu, so they should be at the top for the first sort.

BUG=none
TEST=after opening multiple tabs, bring up the task manager, then click on the
memory column header. It should show the page using the most memory on top.

patch by Sadrul Chowdhury <sadrul [at] chromium [dot] org>
original review: http://codereview.chromium.org/3590009

Review URL: http://codereview.chromium.org/3615006

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@61387 0039d316-1c4b-4281-b951-d872f2087c98

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