IDL: Check method.visible for methods implemented in private script

IDL: Check method.visible for methods implemented in private script

When an interface has partial interfaces in modules/, methods declared
in the partial interfaces are present in interface['methods'] for the
Jinja templates to see, but with method['visible'] set to false, meaning
code shouldn't be generated.

This flag wasn't checked when the private script trampoline of a method
implemented in private script was generated, leading to the trampoline
being defined both in core/v8/V8Foo.cpp and modules/v8/V8FooPartial.cpp.

BUG=341031
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=194747

[Jens Widell, 2015-04-30 14:01:24]

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

[Jens Widell, 2015-04-30 14:01:24]

PTAL

Solves a problem encountered in https://codereview.chromium.org/1084923002/ when
trying to add a partial interface extending Document to modules/.

[vivekg, 2015-04-30 14:07:18]

LGTM

[Jens Widell, 2015-04-30 14:08:33]

On 2015/04/30 14:07:18, vivekg_ wrote:
> LGTM

Thanks!

[Jens Widell, 2015-04-30 14:08:36]

The CQ bit was checked by jl@opera.com

[commit-bot: I haz the power, 2015-04-30 14:09:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1113023002/1

[haraken, 2015-04-30 14:15:54]

LGTM

[commit-bot: I haz the power, 2015-04-30 15:50:54]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=194747