IDL: Implement float/double correctly

IDL: Implement float/double correctly

Specifically, do not require the [TypeChecking=Unrestricted] extended
attribute for correct behavior.

This renders the [TypeChecking=Unrestricted] extended attribute
ineffective, meaning we can then drop it from actual IDL files without
code generation changes.

BUG=354298
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=191108

[Jens Widell, 2015-03-02 10:21:23]

jl@opera.com changed reviewers:
+ haraken@chromium.org

[Jens Widell, 2015-03-02 10:21:23]

PTAL

There are no code generation changes (once the ScrollToOptions CL lands).

I plan to then drop all the [TypeChecking=Unrestricted] uses, split into a few
different CLs, and then finally drop the "Unrestricted" value from
IDLExtendedAttributes.txt.

[haraken, 2015-03-02 10:54:10]

LGTM

[Jens Widell, 2015-03-02 11:50:13]

The CQ bit was checked by jl@opera.com

[Jens Widell, 2015-03-02 11:50:14]

The CQ bit was unchecked by jl@opera.com

[Jens Widell, 2015-03-02 13:04:34]

The CQ bit was checked by jl@opera.com

[commit-bot: I haz the power, 2015-03-02 13:05:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/970843002/1

[commit-bot: I haz the power, 2015-03-02 15:30:43]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=191108