Remove implementation of Entity constructor
Remove implementation of Entity constructor

Remove implementation of Entity constructor as we never construct Entity
objects. This will lead in a link time error if someone tries to use it
instead of a runtime error (due to the ASSERT_NOT_REACHED() in the
constructor).

This gets rid of a case where 0 is passed as TreeScope to the ContainerNode /
Node constructor.

R=adamk

Review URL: https://codereview.chromium.org/62843007

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@162041 bbb929c8-8fbe-4397-9dbb-9b2b20218538

smishenk/blink-crosswalk,XiaosongWei/blink-crosswalk,hgl888/blink-crosswalk-efl,smishenk/blink-crosswalk,jtg-gg/blink,kurli/blink-crosswalk,smishenk/blink-crosswalk,nwjs/blink,smishenk/blink-crosswalk,modulexcite/blink,nwjs/blink,kurli/blink-crosswalk,ondra-novak/blink,ondra-novak/blink,modulexcite/blink,smishenk/blink-crosswalk,nwjs/blink,XiaosongWei/blink-crosswalk,modulexcite/blink,jtg-gg/blink,XiaosongWei/blink-crosswalk,kurli/blink-crosswalk,kurli/blink-crosswalk,modulexcite/blink,PeterWangIntel/blink-crosswalk,modulexcite/blink,XiaosongWei/blink-crosswalk,hgl888/blink-crosswalk-efl,hgl888/blink-crosswalk-efl,ondra-novak/blink,ondra-novak/blink,Bysmyyr/blink-crosswalk,XiaosongWei/blink-crosswalk,Pluto-tv/blink-crosswalk,jtg-gg/blink,PeterWangIntel/blink-crosswalk,XiaosongWei/blink-crosswalk,hgl888/blink-crosswalk-efl,PeterWangIntel/blink-crosswalk,modulexcite/blink,XiaosongWei/blink-crosswalk,hgl888/blink-crosswalk-efl,PeterWangIntel/blink-crosswalk,Pluto-tv/blink-crosswalk,nwjs/blink,Pluto-tv/blink-crosswalk,PeterWangIntel/blink-crosswalk,crosswalk-project/blink-crosswalk-efl,kurli/blink-crosswalk,smishenk/blink-crosswalk,jtg-gg/blink,crosswalk-project/blink-crosswalk-efl,modulexcite/blink,nwjs/blink,XiaosongWei/blink-crosswalk,Pluto-tv/blink-crosswalk,kurli/blink-crosswalk,Pluto-tv/blink-crosswalk,XiaosongWei/blink-crosswalk,crosswalk-project/blink-crosswalk-efl,Bysmyyr/blink-crosswalk,jtg-gg/blink,hgl888/blink-crosswalk-efl,smishenk/blink-crosswalk,XiaosongWei/blink-crosswalk,PeterWangIntel/blink-crosswalk,modulexcite/blink,hgl888/blink-crosswalk-efl,modulexcite/blink,hgl888/blink-crosswalk-efl,Bysmyyr/blink-crosswalk,crosswalk-project/blink-crosswalk-efl,ondra-novak/blink,Bysmyyr/blink-crosswalk,crosswalk-project/blink-crosswalk-efl,nwjs/blink,kurli/blink-crosswalk,ondra-novak/blink,nwjs/blink,ondra-novak/blink,Pluto-tv/blink-crosswalk,kurli/blink-crosswalk,nwjs/blink,hgl888/blink-crosswalk-efl,ondra-novak/blink,crosswalk-project/blink-crosswalk-efl,PeterWangIntel/blink-crosswalk,Pluto-tv/blink-crosswalk,smishenk/blink-crosswalk,Bysmyyr/blink-crosswalk,Pluto-tv/blink-crosswalk,nwjs/blink,ondra-novak/blink,nwjs/blink,jtg-gg/blink,crosswalk-project/blink-crosswalk-efl,Bysmyyr/blink-crosswalk,PeterWangIntel/blink-crosswalk,modulexcite/blink,jtg-gg/blink,kurli/blink-crosswalk,smishenk/blink-crosswalk,hgl888/blink-crosswalk-efl,smishenk/blink-crosswalk,Bysmyyr/blink-crosswalk,jtg-gg/blink,Bysmyyr/blink-crosswalk,jtg-gg/blink,PeterWangIntel/blink-crosswalk,Pluto-tv/blink-crosswalk,jtg-gg/blink,crosswalk-project/blink-crosswalk-efl,crosswalk-project/blink-crosswalk-efl,kurli/blink-crosswalk,Bysmyyr/blink-crosswalk,Pluto-tv/blink-crosswalk,PeterWangIntel/blink-crosswalk,Bysmyyr/blink-crosswalk