Enable the views-based AppInfoDialog on Mac

Enable the views-based AppInfoDialog on Mac

There's an expected ~443kB sizes regression in ChromiumFramework with
this. This is because large portions of views.dylib are still culled at
link time with -dead_strip, but this CL makes more symbols reachable.
For a full accounting see http://crbug.com/485854#c1 (nothing
unexpected).

The dialog is enabled by linking in app_info_dialog_views.cc to provide
functions previously provided (but NOTIMPLEMENTED()) by
app_info_dialog_cocoa.mm.

Note that the views CanShowAppInfoDialog() is implemented as
IsMacViewsAppListListEnabled(), so no user-visible changes occur unless
Chrome is run from the command line with --enable-mac-views-app-list.

With this flag, the `Details` link at chrome://extensions will show the
views-based (and offline-enabled) AppInfo dialog rather than taking the
user to the webstore URL. And the context menu for icons at
chrome://apps will have an `App Info` option.

(Note that the views-based App Launcher isn't currently linked in on
Mac, so the app launcher shown with --enable-mac-views-app-list
--show-app-list doesn't support this dialog yet).

Screenshot at http://crbug.com/485854#c2

BUG=485854
Committed: https://crrev.com/99e8dd40da33d58d598b000e122939b04272c079
Cr-Commit-Position: refs/heads/master@{#329362}

[tapted, 2015-04-01 04:15:41]

Patchset #2 (id:20001) has been deleted

[tapted, 2015-05-11 07:29:37]

tapted@chromium.org changed reviewers:
+ benwells@chromium.org

[tapted, 2015-05-11 07:29:37]

Hi Ben, please take a look

[benwells, 2015-05-12 03:17:43]

lgtm. no, lrrrrrgtm! (looks really really really really really good to me)

[tapted, 2015-05-12 06:16:42]

The CQ bit was checked by tapted@chromium.org

[commit-bot: I haz the power, 2015-05-12 06:17:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1048343002/120001

[commit-bot: I haz the power, 2015-05-12 06:22:58]

Committed patchset #6 (id:120001)

[commit-bot: I haz the power, 2015-05-12 06:23:42]

Patchset 6 (id:??) landed as
https://crrev.com/99e8dd40da33d58d598b000e122939b04272c079
Cr-Commit-Position: refs/heads/master@{#329362}

[tapted, 2015-05-12 07:21:07]

Filed perf bug at http://crbug.com/487106 for the sizes regression with link to
graphs, etc. It actually came out a bit smaller than I was expecting (229kB).