A quick fix for Issue 38417. Our test_shell does not support on-the-spot (or over-the-spot) IME. For such applications, Windows sends two messages for inserting IME text: WM_IME_CHAR and WM_CHAR. Since WM_IME_CHAR messages are only for MBCS applications, our test_shell (which is a Unicode application) doesn't have to receive them.
A quick fix for Issue 38417.
Our test_shell does not support on-the-spot (or over-the-spot) IME. For such applications, Windows sends two messages for inserting IME text: WM_IME_CHAR and WM_CHAR. Since WM_IME_CHAR messages are only for MBCS applications, our test_shell (which is a Unicode application) doesn't have to receive them.

BUG=38417
TEST=run test_shell.exe, click its 'Google' link, enable an IME, insert an IME text, and verify test_shell inserts the IME text only once.
Review URL: http://codereview.chromium.org/2349002

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@48590 0039d316-1c4b-4281-b951-d872f2087c98

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