[Extensions] Don't allow chrome.browserAction.openPopup on popups

[Extensions] Don't allow chrome.browserAction.openPopup on popups

chrome.browserAction.openPopup opens the browser action's popup, but on a
popup window, there is no browser action, and this results in a crash. Fix it,
and add a regression test.

BUG=584747
TBR=lazyboy@chromium.org

Review URL: https://codereview.chromium.org/1683433002

Cr-Commit-Position: refs/heads/master@{#374499}
(cherry picked from commit ec7d228c7522b6e16ef78965924237de654d7f15)

Committed: https://chromium.googlesource.com/chromium/src/+/0f4b0822aa6bb67ba1cea05a2d67c1512389f234

[Devlin, 2016-02-18 00:04:46]

Description was changed from

==========
[Extensions] Don't allow chrome.browserAction.openPopup on popups

chrome.browserAction.openPopup opens the browser action's popup, but on a
popup window, there is no browser action, and this results in a crash. Fix it,
and add a regression test.

BUG=584747
TBR=lazyboy@chromium.org

Review URL: https://codereview.chromium.org/1683433002

Cr-Commit-Position: refs/heads/master@{#374499}
(cherry picked from commit ec7d228c7522b6e16ef78965924237de654d7f15)
==========

to

==========
[Extensions] Don't allow chrome.browserAction.openPopup on popups

chrome.browserAction.openPopup opens the browser action's popup, but on a
popup window, there is no browser action, and this results in a crash. Fix it,
and add a regression test.

BUG=584747
TBR=lazyboy@chromium.org

Review URL: https://codereview.chromium.org/1683433002

Cr-Commit-Position: refs/heads/master@{#374499}
(cherry picked from commit ec7d228c7522b6e16ef78965924237de654d7f15)

Committed:
https://chromium.googlesource.com/chromium/src/+/0f4b0822aa6bb67ba1cea05a2d67...
==========

[Devlin, 2016-02-18 00:04:47]

Committed patchset #2 (id:20001) manually as
0f4b0822aa6bb67ba1cea05a2d67c1512389f234 (presubmit successful).