[Mac] DialogBrowserTest implementation to invoke Content settings bubble dialogs.

[Mac] DialogBrowserTest implementation to invoke Content settings bubble dialogs.

There needs to be a way to invoke all the various content settings bubble dialog views. This wires up the BrowserDialogTest framework in order to invoke/test them.

BUG=652024
patch from issue 2668833003 at patchset 180001 (http://crrev.com/2668833003#ps180001)

[tapted, 2017-02-06 09:21:06]

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

[commit-bot: I haz the power, 2017-02-06 09:21:18]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-02-06 10:11:03]

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

[commit-bot: I haz the power, 2017-02-06 10:11:04]

Dry run: Try jobs failed on following builders:
  win_chromium_x64_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[kylix_rd, 2017-02-06 14:12:39]

kylixrd@chromium.org changed reviewers:
+ kylixrd@chromium.org

[kylix_rd, 2017-02-06 14:12:40]

https://codereview.chromium.org/2675213002/diff/20001/chrome/browser/ui/views...
File chrome/browser/ui/views/location_bar/location_bar_view.cc (right):

https://codereview.chromium.org/2675213002/diff/20001/chrome/browser/ui/views...
chrome/browser/ui/views/location_bar/location_bar_view.cc:1108: }
Doesn't relying on the number and order of the items in content_setting_views_
make this code extremely brittle? What if that order changes? There seems to be
no obvious tie between the index passed in here and the list in
content_setting_bubble_dialog_browsertest.cc. IMO, you've traded fewer changes
to release code for a more brittle test.