GN: Don't allow nested things inside template invocations.

GN: Don't allow nested things inside template invocations.

Previously we would allow this because "component" is a template:
  component("foo") {
    config("bar") {
    }
  }
This patch makes this construct illegal. Allowing this leads to weird errors because the template invocation will have default configs applied to it, and the inner config will pick those up and duplicate all of the target's configs inside of "bar".

Also removes unused "Type" enum which was never used.

BUG=536290
Committed: https://crrev.com/c5598930514b13c0c36992e47d8b5170730001ce
Cr-Commit-Position: refs/heads/master@{#351000}

[brettw, 2015-09-26 05:01:19]

brettw@chromium.org changed reviewers:
+ andybons@chromium.org

[brettw, 2015-09-26 05:01:30]

The CQ bit was checked by brettw@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-09-26 05:01:42]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1361263004/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1361263004/20001

[commit-bot: I haz the power, 2015-09-26 05:14:00]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-09-26 05:14:01]

Dry run: This issue passed the CQ dry run.

[Bons, 2015-09-26 11:13:34]

lgtm

https://codereview.chromium.org/1361263004/diff/20001/tools/gn/functions.h
File tools/gn/functions.h (left):

https://codereview.chromium.org/1361263004/diff/20001/tools/gn/functions.h#ol...
tools/gn/functions.h:438: enum Type {
yay dead code removal!

[brettw, 2015-09-26 16:35:27]

The CQ bit was checked by brettw@chromium.org

[commit-bot: I haz the power, 2015-09-26 16:35:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1361263004/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1361263004/20001

[commit-bot: I haz the power, 2015-09-26 18:08:05]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-09-26 18:08:50]

Patchset 2 (id:??) landed as
https://crrev.com/c5598930514b13c0c36992e47d8b5170730001ce
Cr-Commit-Position: refs/heads/master@{#351000}