Update Closure Compiler

[caridy]

I suspect compat-table is testing closure compiler with the default options without using externs to rewrite the polyfills (which is equivalent to babel-polyfill), that's why you see all the built-ins and built-ins extensions not supported in closure compiler.

@dimvar and @shicks, can you guys help @teppeis to level up the results of closure compiler?

[dimvar]

@shicks just added a command-line flag --rewrite_polyfills to use the polyfills. You need to build the compiler from head, it's not in the released compiler yet. See: google/closure-compiler@f2eb08a

[teppeis]

@dimvar Thanks! I'll update compat-table result after next release.

[caridy]

🍻

[caridy]

@dimvar I wonder what's going on with the built-in section from the table. I see WeakMap, WeakSet, Promise, Proxy, Reflect, and most symbols not implemented after using --rewrite_polyfills. I was expecting a little bit better support.

[Dominator008]

@caridy They are not implemented yet: https://github.com/google/closure-compiler/blob/master/src/com/google/javascript/jscomp/RewritePolyfills.java#L239-L241. Proxy will probably not be implemented at all.