aura: Avoid copying a touch-event in X11.
aura: Avoid copying a touch-event in X11.

There are two ways this was bad:
 * Copying a touch-release event ended up with an incorrect touch-id. This is
   because the original XEvent was releasing the slot-id associated with the
   tracking-id of the event. When the event is copied, the copied event then
   would look for a new touch-id for the same tracking id, and would end up with
   the first available touch-id, which may or may not be the same as the
   touch-id of the original native event (e.g. when second finger is released
   after first finger).
 * The copied XEvent was leaking, because set_delete_native_event was not being
   set on the TouchEvent. So every queued touch-event was leaking an Xevent.
   Yikes.

Making a copy of the native event does not provide any benefits. So avoid copying altogether.

BUG=none
TEST=none

Review URL: https://chromiumcodereview.appspot.com/10272025

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@134711 0039d316-1c4b-4281-b951-d872f2087c98

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