Revert 110361 - NaCl: preallocate shared-memory object on Linux as on MacOSX

Revert 110361 - NaCl: preallocate shared-memory object on Linux as on MacOSX

Preallocating the shared memory object saves an IPC round trip.
It also makes the code path more similar for Linux and Mac.
It also lays the groundwork for changing the allocation method
later without having to replumb the proxying layer.

BUG= http://code.google.com/p/chromium/issues/detail?id=103377
TEST= nacl still works on Linux

R=mseaborn@chromium.org,jam@chromium.org

Review URL: http://codereview.chromium.org/8513018

TBR=mseaborn@chromium.org
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=110776

[Mark Seaborn, 2011-11-18 22:59:23]

Please state why you're reverting this.

[Roland McGrath, 2011-11-18 23:05:54]

On 2011/11/18 22:59:23, Mark Seaborn wrote:
> Please state why you're reverting this.

http://code.google.com/p/chromium/issues/detail?id=104664

resolution still under investigation