Also allocate small typed arrays on heap when initialized from an array-like

Also allocate small typed arrays on heap when initialized from an array-like

This means something like new Float32Array([23, 42]) will be allocated on heap.

BUG=v8:3996
R=bmeurer@chromium.org,mstarzinger@chromium.org
LOG=y

Committed: https://crrev.com/1d1df96d2349a2e2089c00bbf0190318b0a84579
Cr-Commit-Position: refs/heads/master@{#28780}

[jochen (gone - plz use gerrit), 2015-06-01 15:14:27]

wdyt?

the impact on the code is minimal...

[Benedikt Meurer, 2015-06-02 04:43:02]

On 2015/06/01 15:14:27, jochen wrote:
> wdyt?
> 
> the impact on the code is minimal...

As mentioned yesterday: IMHO we will put ourselves in a bad position if we do
this now. I'd first explore the options that do not involve on-heap typed arrays
at all.

[jochen (gone - plz use gerrit), 2015-06-02 07:36:40]

On 2015/06/02 at 04:43:02, bmeurer wrote:
> On 2015/06/01 15:14:27, jochen wrote:
> > wdyt?
> > 
> > the impact on the code is minimal...
> 
> As mentioned yesterday: IMHO we will put ourselves in a bad position if we do
this now. I'd first explore the options that do not involve on-heap typed arrays
at all.

Well, given that we already have on-heap typed arrays, and that even if we can
fully escape analyse them, we'll still need to create them in the end, I don't
think we put ourselves into a worse position.

[Michael Starzinger, 2015-06-02 12:02:49]

LGTM.

[jochen (gone - plz use gerrit), 2015-06-02 14:01:40]

I'll land this tomorrow.

[jochen (gone - plz use gerrit), 2015-06-03 07:16:42]

The CQ bit was checked by jochen@chromium.org

[commit-bot: I haz the power, 2015-06-03 07:17:05]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1144393003/1

[commit-bot: I haz the power, 2015-06-03 07:41:33]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-03 07:41:48]

Patchset 1 (id:??) landed as
https://crrev.com/1d1df96d2349a2e2089c00bbf0190318b0a84579
Cr-Commit-Position: refs/heads/master@{#28780}