[Runtime] WARP security mode should be enabled by default.
[Runtime] WARP security mode should be enabled by default.

According to the W3C widget spec, http://www.w3.org/TR/widgets-access/,
it said: In the default policy, a user agent must deny access to network
resources external to the widget by default, whether this access is
requested through APIs (e.g. XMLHttpRequest) or through
markup (e.g. iframe, script, img). Means if there's no access tag in
config.xml, all external requests should be blocked.

BUG=XWALK-1772

heke123/crosswalk,zeropool/crosswalk,baleboy/crosswalk,heke123/crosswalk,lincsoon/crosswalk,chuan9/crosswalk,dreamsxin/crosswalk,myroot/crosswalk,alex-zhang/crosswalk,hgl888/crosswalk-efl,PeterWangIntel/crosswalk,crosswalk-project/crosswalk,jondwillis/crosswalk,huningxin/crosswalk,hgl888/crosswalk,xzhan96/crosswalk,zliang7/crosswalk,bestwpw/crosswalk,tomatell/crosswalk,RafuCater/crosswalk,chuan9/crosswalk,axinging/crosswalk,rakuco/crosswalk,tomatell/crosswalk,lincsoon/crosswalk,pk-sam/crosswalk,jpike88/crosswalk,lincsoon/crosswalk,siovene/crosswalk,mrunalk/crosswalk,tedshroyer/crosswalk,amaniak/crosswalk,jondong/crosswalk,XiaosongWei/crosswalk,crosswalk-project/crosswalk-efl,Bysmyyr/crosswalk,marcuspridham/crosswalk,hgl888/crosswalk,Pluto-tv/crosswalk,TheDirtyCalvinist/spacewalk,DonnaWuDongxia/crosswalk,Pluto-tv/crosswalk,PeterWangIntel/crosswalk,Pluto-tv/crosswalk,marcuspridham/crosswalk,weiyirong/crosswalk-1,siovene/crosswalk,minggangw/crosswalk,XiaosongWei/crosswalk,XiaosongWei/crosswalk,weiyirong/crosswalk-1,mrunalk/crosswalk,tomatell/crosswalk,myroot/crosswalk,darktears/crosswalk,TheDirtyCalvinist/spacewalk,DonnaWuDongxia/crosswalk,xzhan96/crosswalk,tomatell/crosswalk,huningxin/crosswalk,fujunwei/crosswalk,bestwpw/crosswalk,jpike88/crosswalk,lincsoon/crosswalk,mrunalk/crosswalk,fujunwei/crosswalk,huningxin/crosswalk,leonhsl/crosswalk,pk-sam/crosswalk,siovene/crosswalk,xzhan96/crosswalk,minggangw/crosswalk,DonnaWuDongxia/crosswalk,fujunwei/crosswalk,amaniak/crosswalk,zeropool/crosswalk,crosswalk-project/crosswalk,hgl888/crosswalk-efl,qjia7/crosswalk,jondwillis/crosswalk,leonhsl/crosswalk,chinakids/crosswalk,lincsoon/crosswalk,PeterWangIntel/crosswalk,RafuCater/crosswalk,xzhan96/crosswalk,chuan9/crosswalk,crosswalk-project/crosswalk-efl,chinakids/crosswalk,RafuCater/crosswalk,siovene/crosswalk,siovene/crosswalk,amaniak/crosswalk,jondong/crosswalk,zliang7/crosswalk,leonhsl/crosswalk,hgl888/crosswalk-efl,RafuCater/crosswalk,rakuco/crosswalk,chuan9/crosswalk,XiaosongWei/crosswalk,marcuspridham/crosswalk,XiaosongWei/crosswalk,leonhsl/crosswalk,PeterWangIntel/crosswalk,fujunwei/crosswalk,Pluto-tv/crosswalk,chinakids/crosswalk,siovene/crosswalk,DonnaWuDongxia/crosswalk,heke123/crosswalk,jondong/crosswalk,minggangw/crosswalk,zliang7/crosswalk,baleboy/crosswalk,mrunalk/crosswalk,stonegithubs/crosswalk,crosswalk-project/crosswalk,Bysmyyr/crosswalk,marcuspridham/crosswalk,minggangw/crosswalk,weiyirong/crosswalk-1,rakuco/crosswalk,baleboy/crosswalk,mrunalk/crosswalk,baleboy/crosswalk,ZhengXinCN/crosswalk,XiaosongWei/crosswalk,heke123/crosswalk,Bysmyyr/crosswalk,rakuco/crosswalk,dreamsxin/crosswalk,bestwpw/crosswalk,baleboy/crosswalk,hgl888/crosswalk,zeropool/crosswalk,alex-zhang/crosswalk,chinakids/crosswalk,PeterWangIntel/crosswalk,DonnaWuDongxia/crosswalk,darktears/crosswalk,qjia7/crosswalk,darktears/crosswalk,xzhan96/crosswalk,stonegithubs/crosswalk,dreamsxin/crosswalk,baleboy/crosswalk,darktears/crosswalk,weiyirong/crosswalk-1,chuan9/crosswalk,crosswalk-project/crosswalk-efl,hgl888/crosswalk-efl,pk-sam/crosswalk,hgl888/crosswalk,xzhan96/crosswalk,dreamsxin/crosswalk,pk-sam/crosswalk,hgl888/crosswalk,jondong/crosswalk,hgl888/crosswalk,tomatell/crosswalk,alex-zhang/crosswalk,jondong/crosswalk,huningxin/crosswalk,bestwpw/crosswalk,crosswalk-project/crosswalk,PeterWangIntel/crosswalk,zeropool/crosswalk,stonegithubs/crosswalk,Pluto-tv/crosswalk,huningxin/crosswalk,Bysmyyr/crosswalk,tomatell/crosswalk,DonnaWuDongxia/crosswalk,rakuco/crosswalk,ZhengXinCN/crosswalk,XiaosongWei/crosswalk,zliang7/crosswalk,TheDirtyCalvinist/spacewalk,jondwillis/crosswalk,jpike88/crosswalk,Bysmyyr/crosswalk,pk-sam/crosswalk,alex-zhang/crosswalk,rakuco/crosswalk,amaniak/crosswalk,zliang7/crosswalk,zeropool/crosswalk,TheDirtyCalvinist/spacewalk,crosswalk-project/crosswalk-efl,darktears/crosswalk,rakuco/crosswalk,axinging/crosswalk,xzhan96/crosswalk,bestwpw/crosswalk,jpike88/crosswalk,siovene/crosswalk,marcuspridham/crosswalk,leonhsl/crosswalk,TheDirtyCalvinist/spacewalk,RafuCater/crosswalk,leonhsl/crosswalk,alex-zhang/crosswalk,Bysmyyr/crosswalk,hgl888/crosswalk-efl,dreamsxin/crosswalk,heke123/crosswalk,PeterWangIntel/crosswalk,marcuspridham/crosswalk,jondwillis/crosswalk,qjia7/crosswalk,qjia7/crosswalk,weiyirong/crosswalk-1,jondwillis/crosswalk,stonegithubs/crosswalk,RafuCater/crosswalk,crosswalk-project/crosswalk,dreamsxin/crosswalk,alex-zhang/crosswalk,crosswalk-project/crosswalk,crosswalk-project/crosswalk,huningxin/crosswalk,zeropool/crosswalk,chuan9/crosswalk,heke123/crosswalk,myroot/crosswalk,tomatell/crosswalk,ZhengXinCN/crosswalk,weiyirong/crosswalk-1,fujunwei/crosswalk,hgl888/crosswalk-efl,RafuCater/crosswalk,zliang7/crosswalk,heke123/crosswalk,tedshroyer/crosswalk,darktears/crosswalk,myroot/crosswalk,crosswalk-project/crosswalk-efl,ZhengXinCN/crosswalk,baleboy/crosswalk,axinging/crosswalk,minggangw/crosswalk,dreamsxin/crosswalk,zliang7/crosswalk,fujunwei/crosswalk,bestwpw/crosswalk,tedshroyer/crosswalk,amaniak/crosswalk,TheDirtyCalvinist/spacewalk,leonhsl/crosswalk,pk-sam/crosswalk,jpike88/crosswalk,darktears/crosswalk,alex-zhang/crosswalk,fujunwei/crosswalk,chinakids/crosswalk,Pluto-tv/crosswalk,amaniak/crosswalk,chinakids/crosswalk,jondong/crosswalk,hgl888/crosswalk-efl,qjia7/crosswalk,lincsoon/crosswalk,marcuspridham/crosswalk,bestwpw/crosswalk,marcuspridham/crosswalk,crosswalk-project/crosswalk-efl,tedshroyer/crosswalk,tedshroyer/crosswalk,rakuco/crosswalk,stonegithubs/crosswalk,xzhan96/crosswalk,ZhengXinCN/crosswalk,baleboy/crosswalk,zeropool/crosswalk,axinging/crosswalk,weiyirong/crosswalk-1,minggangw/crosswalk,myroot/crosswalk,tedshroyer/crosswalk,lincsoon/crosswalk,mrunalk/crosswalk,crosswalk-project/crosswalk-efl,hgl888/crosswalk,crosswalk-project/crosswalk,pk-sam/crosswalk,myroot/crosswalk,chuan9/crosswalk,jondong/crosswalk,axinging/crosswalk,axinging/crosswalk,DonnaWuDongxia/crosswalk,heke123/crosswalk,Bysmyyr/crosswalk,qjia7/crosswalk,lincsoon/crosswalk,jondong/crosswalk,amaniak/crosswalk,ZhengXinCN/crosswalk,darktears/crosswalk,minggangw/crosswalk,stonegithubs/crosswalk,Bysmyyr/crosswalk,axinging/crosswalk,minggangw/crosswalk,hgl888/crosswalk,ZhengXinCN/crosswalk,zliang7/crosswalk,tedshroyer/crosswalk,jpike88/crosswalk,stonegithubs/crosswalk,jpike88/crosswalk,jondwillis/crosswalk,Pluto-tv/crosswalk,jondwillis/crosswalk