IDL: Conversion to Dictionary is trivial (can't fail)

IDL: Conversion to Dictionary is trivial (can't fail)

Conversion from v8::Value to blink::Dictionary simply stores a reference
to the v8::Value in the blink::Dictionary object, so can't throw an
exception.  Adjust v8_conversion_is_trivial() accordingly, to avoid
use of TONATIVE_VOID(_INTERNAL) and thus declaration of unnecessary
v8::TryCatch locals.

BUG=413257
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=182331

[Jens Widell, 2014-09-19 12:02:01]

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

[Jens Widell, 2014-09-19 12:02:02]

PTAL

[bashi, 2014-09-19 12:23:14]

LGTM

[haraken, 2014-09-19 12:33:55]

LGTM2

[Jens Widell, 2014-09-19 12:52:26]

The CQ bit was checked by jl@opera.com

[commit-bot: I haz the power, 2014-09-19 12:52:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/587653002/2

[commit-bot: I haz the power, 2014-09-19 14:36:14]

Committed patchset #2 (id:2) as 182331