Bindings: Make interface operation (method) properties configurable

Bindings: Make interface operation properties configurable

Per the Web IDL spec [1]:

4.5.8. Operations: "The property has attributes {
[[Writable]]: B, [[Enumerable]]: true, [[Configurable]]: B
}, where B is false if the operation is unforgeable on the
interface, and true otherwise."

In other words, Object.getOwnPropertyDescriptor(i.p, 'm')
should have configurable: true, except for [Unforgeable]
which is already special-cased.

[1] http://heycam.github.io/webidl/#es-operations

BUG=138217, 377476
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=190695

[jsbell, 2015-02-20 23:57:47]

https://codereview.chromium.org/948583002/diff/20001/LayoutTests/TestExpectat...
File LayoutTests/TestExpectations (left):

https://codereview.chromium.org/948583002/diff/20001/LayoutTests/TestExpectat...
LayoutTests/TestExpectations:1307: crbug.com/377476 fast/js/function-name.html [
NeedsManualRebaseline ]
These have been disabled for nearly a year. IMHO we should turn them back on
until the v8 change is really ready to land.

[jsbell, 2015-02-21 03:30:55]

Looks promising. The failures are:

canvas/philip/tests/type.prototype.html
virtual/display_list_2d_canvas/canvas/philip/tests/type.prototype.html
virtual/gpu/canvas/philip/tests/type.prototype.html
http/tests/w3c/webperf/approved/UserTiming/idlharness.html
http/tests/w3c/webperf/approved/HighResolutionTime/idlharness.html

... all of which are actually changing from a FAIL to a PASS in the output. I'll
double check and rebaseline them.

[haraken, 2015-02-21 06:59:15]

LGTM

[Jens Widell, 2015-02-21 08:24:51]

jl@opera.com changed reviewers:
+ jl@opera.com

[Jens Widell, 2015-02-21 08:24:51]

LGTM

[jsbell, 2015-02-23 17:46:26]

New patchsets have been uploaded after l-g-t-m from
haraken@chromium.org,jl@opera.com

[jsbell, 2015-02-23 23:02:12]

The CQ bit was checked by jsbell@chromium.org

[commit-bot: I haz the power, 2015-02-23 23:03:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/948583002/40001

[commit-bot: I haz the power, 2015-02-23 23:16:28]

Committed patchset #3 (id:40001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=190695