Add basic API support for Map & Set

Add basic API support for Map & Set

Only supports constructing new objects and returning size.
Followup patch will need to add ability to retrieve and
set contents in order to support structured clone.

Also removes a bunch of outdated "experimental" markers from v8.h.

BUG=v8:3340
LOG=y

Committed: https://crrev.com/395fa8ba2439f7e768376f7512553d66b67d1c87
Cr-Commit-Position: refs/heads/master@{#28637}

[adamk, 2015-05-21 20:50:08]

adamk@chromium.org changed reviewers:
+ arv@chromium.org, jochen@chromium.org

[jochen (gone - plz use gerrit), 2015-05-22 09:11:05]

include/ lgtm

[adamk, 2015-05-22 21:37:22]

See also https://codereview.chromium.org/1148383007/ and
https://codereview.chromium.org/1155893003/. Happy to smash them together into
one if that's preferred.

[arv (Not doing code reviews), 2015-05-26 16:31:31]

LGTM

[adamk, 2015-05-26 17:10:06]

The CQ bit was checked by adamk@chromium.org

[commit-bot: I haz the power, 2015-05-26 17:10:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1157453002/1

[commit-bot: I haz the power, 2015-05-26 17:36:57]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-26 17:37:13]

Patchset 1 (id:??) landed as
https://crrev.com/395fa8ba2439f7e768376f7512553d66b67d1c87
Cr-Commit-Position: refs/heads/master@{#28637}

[jochen (gone - plz use gerrit), 2015-06-01 13:32:27]

https://codereview.chromium.org/1157453002/diff/1/src/bootstrapper.cc
File src/bootstrapper.cc (right):

https://codereview.chromium.org/1157453002/diff/1/src/bootstrapper.cc#newcode...
src/bootstrapper.cc:1221:
native_context()->set_js_map_map(js_map_fun->initial_map());
this doesn't work :-/

the prototype of the Map() function is overwritten in collection.js which runs
after this code.

if you built without a snapshot and create a Map via the C++ API, the resulting
object's __proto__ will be Object.prototype

you should store the function in the native context, and read the initial map in
ConfigureGlobalObjects

[adamk, 2015-06-01 21:30:02]

https://codereview.chromium.org/1157453002/diff/1/src/bootstrapper.cc
File src/bootstrapper.cc (right):

https://codereview.chromium.org/1157453002/diff/1/src/bootstrapper.cc#newcode...
src/bootstrapper.cc:1221:
native_context()->set_js_map_map(js_map_fun->initial_map());
On 2015/06/01 13:32:27, jochen wrote:
> this doesn't work :-/
> 
> the prototype of the Map() function is overwritten in collection.js which runs
> after this code.
> 
> if you built without a snapshot and create a Map via the C++ API, the
resulting
> object's __proto__ will be Object.prototype
> 
> you should store the function in the native context, and read the initial map
in
> ConfigureGlobalObjects

Good eye, fix up for review at https://codereview.chromium.org/1161363002