[Courgette] AssemblyProgram: Serialize data to single raw buffer, instead of storing pointer of obj…

[Courgette] AssemblyProgram: Serialize data to single raw buffer, instead of storing pointer of objects.

BUG=660980

[huangs, 2016-11-07 04:22:45]

Patch 2 does things the straightforward way, but is kinda fragile.  Patch 3
makes things more robust, but bloats the CL. Still have to think about this.

[huangs, 2016-11-11 06:49:04]

Description was changed from

==========
[Courgette] AssemblyProgram: Serialize data to single raw buffer, instead of
storing pointer of objects.

BUG=660980
==========

to

==========
[Courgette] AssemblyProgram: Serialize data to single raw buffer, instead of
storing pointer of objects.

BUG=660980
==========

[huangs, 2016-11-11 06:49:05]

huangs@chromium.org changed reviewers:
+ chrisha@chromium.org, grt@chromium.org, wfh@chromium.org

[huangs, 2016-11-11 07:00:15]

The CL works: I'm seeing peak RAM reduction near 20 MiB for 32-bit, and 30 MiB
for 64-bit Courgette-apply. However, the serialization code is rather ugly, and
doing it .  In retrospect, Phase 2 is not that hard.  I'm planning to do the
following:

- Abandon this CL.
- CL: Refactor AdjustmentMethod(2) to grab Labels directly from LabelManager.
- CL: Stream data directly from Disassembler to EncodedProgram, using
AssemblyProgram as a thin wrapper.

Will resume next week.  Thanks!