core_services: Run different services in different processes.

core_services: Run different services in different processes.

When mandoline is run with --enable-multiprocess, we should run some
services in different processes. This reuses |qualifier| in
Identity (which is already used for content handlers that need to run in
different contexts) to be a process name in contexts where there is a
package alias. This places mojo:network_services in its own process, and
everything else in a different process.

When run without --enable-multiprocess, this change is a noop.

BUG=477435
Committed: https://crrev.com/88221a5c027ab748c0bca451736c398098d125d2
Cr-Commit-Position: refs/heads/master@{#329421}

[Elliot Glaysher, 2015-05-12 00:27:53]

erg@chromium.org changed reviewers:
+ jam@chromium.org

[jam, 2015-05-12 15:52:40]

lgtm

[Elliot Glaysher, 2015-05-12 16:39:14]

The CQ bit was checked by erg@chromium.org

[commit-bot: I haz the power, 2015-05-12 16:40:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1126393006/20001

[commit-bot: I haz the power, 2015-05-12 16:44:57]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-05-12 16:46:39]

Patchset 2 (id:??) landed as
https://crrev.com/88221a5c027ab748c0bca451736c398098d125d2
Cr-Commit-Position: refs/heads/master@{#329421}