This header defines variables, which is unconventional, but okay for test code. Unfortunately, linux whines about variables declared-but-not-used if you include this header but don't use every single one of the variables defined.
This header defines variables, which is unconventional, but okay for test code.
Unfortunately, linux whines about variables declared-but-not-used if you
include this header but don't use every single one of the variables defined.

Add gcc-specific magic to allow these variables to go unused.

BUG=none
TEST=n/a

Review URL: http://codereview.chromium.org/6681002

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@77823 0039d316-1c4b-4281-b951-d872f2087c98

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