Android: Work around driver bug reporting GL errors.
Android: Work around driver bug reporting GL errors.

The driver on the S3 w/ARM Mali erroneously reports
GL_INVALID_FRAMEBUFFER_OPERATION when you call glGetError() while the
bound FBO is incomplete. This causes various DCHECKs to fail.

Simply unbind the FBO for the --composite-to-mailbox path when we drop
the backing or send the frame to the browser. This will cause the
default FBO to be bound by the command decoder.

BUG=196635
NOTRY=True

Review URL: https://chromiumcodereview.appspot.com/12529021

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@188831 0039d316-1c4b-4281-b951-d872f2087c98

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