Change ContentLinker to share relro sections with browser process only on low-end devices.

Change ContentLinker to share relro sections with browser process only on low-end devices.

While this change increases memory usage on non low-end devices, the
impact is small enough that we can limit the exposure surface to only
where it makes a signficant impact.

Also adds content_linker_test_apk to the android builders to ensure it
doesn't regress.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=247622

[digit1, 2014-01-22 04:10:46]

I'm ok with the patch, but did you run the content linker unittests as well to
check that they don't need updating, i.e.:
  build/android/test_runner.py gtest -s content_linker_unittest

[Yaron, 2014-01-22 18:32:17]

So.. that target didn't actually compile because the bots don't build it. Fixed
compilation and ensured bots actually build it. Also ran tests which pass. For
posterity it's:
 build/android/test_runner.py linker

[palmer, 2014-01-24 03:10:37]

LGTM. Thanks!

[commit-bot: I haz the power, 2014-01-28 02:51:06]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/yfriedman@chromium.org/139743011/140001

[commit-bot: I haz the power, 2014-01-28 03:08:27]

Retried try job too often on mac_rel for step(s) base_unittests, browser_tests,
interactive_ui_tests, net_unittests, unit_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=mac_rel&nu...

[commit-bot: I haz the power, 2014-01-28 21:40:50]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/yfriedman@chromium.org/139743011/140001

[commit-bot: I haz the power, 2014-01-28 22:13:35]

Retried try job too often on linux_clang for step(s) compile
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux_clan...

[commit-bot: I haz the power, 2014-01-29 00:47:05]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/yfriedman@chromium.org/139743011/160001

[commit-bot: I haz the power, 2014-01-29 05:12:28]

Change committed as 247622