X87: [es6] Throw TypeError for computed static prototype property name

X87:  [es6] Throw TypeError for computed static prototype property name

port 8d946b9c3f6ea42dd5232c0529be4d47798b06aa (r27106).

original commit message:

  [es6] Throw TypeError for computed static prototype property name

  The prototype of a class constructor function is read only. When we set
  computed property names we were ignoring this and we were overriding the
  property.

  Since the prototype is the only possible own read only property on the
  constructor function object we special case this so we do not have to
  check this for every property in the class literal.

BUG=

Committed: https://crrev.com/113037d9f32d70602ab79a5d1b75c949a89ac49d
Cr-Commit-Position: refs/heads/master@{#27356}

[chunyang.dai, 2015-03-23 08:15:12]

chunyang.dai@intel.com changed reviewers:
+ weiliang.lin@intel.com

[chunyang.dai, 2015-03-23 08:15:13]

PTAL.

[Weiliang, 2015-03-23 08:19:51]

The CQ bit was checked by weiliang.lin@intel.com

[Weiliang, 2015-03-23 08:19:51]

lgtm

[commit-bot: I haz the power, 2015-03-23 08:20:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1028983002/1

[commit-bot: I haz the power, 2015-03-23 08:50:21]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-23 08:50:38]

Patchset 1 (id:??) landed as
https://crrev.com/113037d9f32d70602ab79a5d1b75c949a89ac49d
Cr-Commit-Position: refs/heads/master@{#27356}