Revert 267170 "Use DiscardableMemoryManager on Android."

Revert 267170 "Use DiscardableMemoryManager on Android."

> Use DiscardableMemoryManager on Android.
> 
> This allows userspace (DiscardableMemoryManager) to control eviction of
> unlocked DiscardableMemory instances to prevent the process from running out of
> address space in cases of heavy use of unlocked DiscardableMemory.
> 
> This also removes all the occurences of 'Android' from the ashmem allocator to
> allow it to be later used on ChromeOS.
> 
> BUG=327516, 334996
> R=reveman@chromium.org, willchan@chromium.org
> 
> Review URL: https://codereview.chromium.org/195863005

TBR=pliard@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=267175

[Philippe, 2014-04-30 11:15:51]

Committed patchset #1 manually as r267175 (tree was closed).

[tomhudson, 2014-04-30 11:24:27]

Why the revert, please?

[Philippe, 2014-04-30 11:28:02]

On 2014/04/30 11:24:27, tomhudson wrote:
> Why the revert, please?

So it turns out that the non-clobber Android builder failed at the compile step
but the clobber one did succeed :) It seems that the incremental builder didn't
like the file rename :/

I will find a way to reland this soon anyway.