Simplify OSAllocator.

Simplify OSAllocator.

Follow-up cleanup as discussed in https://chromiumcodereview.appspot.com/13901012/#msg2.
Keep only the simple version of OSAllocator::decommitAndRelease(). 
Also remove PageAllocationAligned.cpp, it is no longer needed.

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=148790

[lgombos, 2013-04-21 04:02:51]

Cleanup. 

Possibly more of the allocator code could be removed after changing regexp
implementation in inspector/ContentSearchUtils.cpp from yarr (as discussed on
blink-dev).

[abarth-chromium, 2013-04-21 06:59:04]

lgtm

[commit-bot: I haz the power, 2013-04-21 06:59:19]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/l.gombos@samsung.com/14156006/1

[commit-bot: I haz the power, 2013-04-21 07:12:36]

Sorry for I got bad news for ya.
Compile failed with a clobber build on linux_layout_rel.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux_layo...
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.

[abarth-chromium, 2013-04-21 07:15:45]

I think the linux_layout_rel bot is broken for some reason.  The error it's
reporting doesn't make any sense.

[commit-bot: I haz the power, 2013-04-21 11:35:38]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/l.gombos@samsung.com/14156006/1

[commit-bot: I haz the power, 2013-04-21 11:49:17]

Change committed as 148790