
Move FormData extern into javascript/externs/w3c_xml.js

Refer to http://www.w3.org/TR/XMLHttpRequest2/#formdata

R=nicksantos
DELTA=38  (18 added, 19 deleted, 1 changed)


Revision created by MOE tool push_codebase.
MOE_MIGRATION=1458


ajukraine/closure-compiler,ajukraine/closure-compiler