Fix representation generalization for doubles.

Fix representation generalization for doubles.

BUG=
R=verwaest@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=19599

[Toon Verwaest, 2014-02-28 10:59:14]

lgtm with nits

https://codereview.chromium.org/184393002/diff/1/test/mjsunit/regress/regress...
File test/mjsunit/regress/regress-347909.js (right):

https://codereview.chromium.org/184393002/diff/1/test/mjsunit/regress/regress...
test/mjsunit/regress/regress-347909.js:4: 
Flags: --allow-natives-syntax

https://codereview.chromium.org/184393002/diff/1/test/mjsunit/regress/regress...
test/mjsunit/regress/regress-347909.js:5: a = {y:1.5};
var a =, var b =, var d =

https://codereview.chromium.org/184393002/diff/1/test/mjsunit/regress/regress...
test/mjsunit/regress/regress-347909.js:8: a.y= {};
add space after a.y

[Hannes Payer (out of office), 2014-02-28 11:06:52]

https://codereview.chromium.org/184393002/diff/1/test/mjsunit/regress/regress...
File test/mjsunit/regress/regress-347909.js (right):

https://codereview.chromium.org/184393002/diff/1/test/mjsunit/regress/regress...
test/mjsunit/regress/regress-347909.js:4: 
On 2014/02/28 10:59:15, Toon Verwaest wrote:
> Flags: --allow-natives-syntax

Done.

https://codereview.chromium.org/184393002/diff/1/test/mjsunit/regress/regress...
test/mjsunit/regress/regress-347909.js:5: a = {y:1.5};
On 2014/02/28 10:59:15, Toon Verwaest wrote:
> var a =, var b =, var d =

Done.

https://codereview.chromium.org/184393002/diff/1/test/mjsunit/regress/regress...
test/mjsunit/regress/regress-347909.js:8: a.y= {};
On 2014/02/28 10:59:15, Toon Verwaest wrote:
> add space after a.y

Done.

[Hannes Payer (out of office), 2014-02-28 11:07:16]

Committed patchset #2 manually as r19599 (tree was closed).