Reland "components: Fix 'gn check' errors for omnibox."

Reland "components: Fix 'gn check' errors for omnibox."

This reverts commit cc83d2d66b34ea56edba30cd90538fc1a3343e4f.

Tested on Linux with the following command lines:

$ gn gen out-gn/Release --args='is_debug=false is_component_build=false symbol_level=1'
$ gn check out-gn/Release //components/omnibox/*

BUG=367595, 376000
TEST=see above
R=brettw@chromium.org

Committed: https://crrev.com/c312b420fa49acded38e4bbc00f0f822e4427147
Cr-Commit-Position: refs/heads/master@{#339700}

[tfarina, 2015-07-20 23:56:17]

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

[tfarina, 2015-07-20 23:56:34]

Hi Brett, could you review this to me?

[brettw, 2015-07-21 16:29:16]

lgtm

[tfarina, 2015-07-21 18:10:42]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2015-07-21 18:11:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1242973003/20001

[commit-bot: I haz the power, 2015-07-21 18:17:58]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-07-21 18:19:57]

Patchset 2 (id:??) landed as
https://crrev.com/c312b420fa49acded38e4bbc00f0f822e4427147
Cr-Commit-Position: refs/heads/master@{#339700}