Update libvpx to r178936 to pick up:
Update libvpx to r178936 to pick up:

r178936 | mark@chromium.org | 2013-01-25 18:23:36 -0500 (Fri, 25 Jan 2013) | 9 lines

64-bit Mac Chromium support for libvpx.
    
For 64-bit Mac Chromium, use private_extern for HIDDEN_DATA, the same as
32-bit Mac Chromium.

This is a cherry-pick of upstream e48776f29bbc991b1842c80baf8f3b3d5e24eceb.

TBR=tomfinegan
Review URL: https://codereview.chromium.org/12091002
Review URL: https://codereview.chromium.org/12090004

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@178939 0039d316-1c4b-4281-b951-d872f2087c98

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