Remove codes related to scaling in GraphicsLayer tree.

Remove codes related to scaling in GraphicsLayer tree.

There are three kind of codes:
1. getters of page/device scale.
2. callbacks when page/device scale is changed.
3. layer pixel aligned booleans.

All codes are not used, so this patch removes all.

BUG=

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=150298

[aelias_OOO_until_Jul13, 2013-05-13 07:50:40]

lgtm

Thanks for the cleanup!

[commit-bot: I haz the power, 2013-05-13 11:33:18]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/dongseong.hwang@intel.com/14974003/1

[dshwang, 2013-05-13 11:34:37]

On 2013/05/13 07:50:40, aelias wrote:
> lgtm
> 
> Thanks for the cleanup!

Thank you for your review!

[commit-bot: I haz the power, 2013-05-13 11:40:35]

Retried try job too often on blink_bare_presubmit for step(s) presubmit
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=blink_bare...

[commit-bot: I haz the power, 2013-05-13 13:51:51]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/dongseong.hwang@intel.com/14974003/1

[commit-bot: I haz the power, 2013-05-13 14:00:19]

Retried try job too often on blink_bare_presubmit for step(s) presubmit
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=blink_bare...

[danakj, 2013-05-13 15:36:14]

On Mon, May 13, 2013 at 10:00 AM, <commit-bot@chromium.org> wrote:

> Retried try job too often on blink_bare_presubmit for step(s) presubmit
> http://build.chromium.org/p/**tryserver.chromium/**
>
buildstatus?builder=blink_**bare_presubmit&number=860<http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=blink_bare_presubmit&number=860>


You're missing OWNERs approval.


>
>
>
https://chromiumcodereview.**appspot.com/14974003/<https://chromiumcodereview...
>

[dshwang, 2013-05-13 16:40:49]

On 2013/05/13 15:36:14, danakj wrote:
> 
> You're missing OWNERs approval.

ah, I thought aellas is one of OWNERs. Thanks for noting.

jamesr, could you review please?

[jamesr, 2013-05-13 17:19:42]

lgtm

lgtm with gusto. Thanks!

[commit-bot: I haz the power, 2013-05-13 17:19:54]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/dongseong.hwang@intel.com/14974003/1

[commit-bot: I haz the power, 2013-05-13 17:41:09]

Sorry for I got bad news for ya.
Compile failed with a clobber build on mac_layout.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=mac_layout...
Your code is likely broken or HEAD is junk. Please ensure your
code is not broken then alert the build sheriffs.
Look at the try server FAQ for more details.

[commit-bot: I haz the power, 2013-05-14 05:13:59]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/dongseong.hwang@intel.com/14974003/23001

[dshwang, 2013-05-14 05:14:17]

On 2013/05/13 17:19:42, jamesr wrote:
> lgtm
> 
> lgtm with gusto. Thanks!

Thank you for review!

[commit-bot: I haz the power, 2013-05-14 07:23:48]

Change committed as 150298