[Media Router WebUI] Handle route details in incognito.

[Media Router WebUI] Handle route details in incognito.

While we currently don't support split mode for the extension, we cannot do any toplevel navigations with the component extension with extensionview. Thus, anyone trying to view the route details in incognito mode will see a "This site can't be reached" error message if there was custom controls available for the route.

This change only shows the default route details description when the browser is "off the record", aka in incognito mode.

BUG=604407
Review URL: https://codereview.chromium.org/1898953002

Cr-Commit-Position: refs/heads/master@{#388107}
(cherry picked from commit 34b4be50fde0e4a79798bab28a47acbadc0e6479)

Committed: https://chromium.googlesource.com/chromium/src/+/cc5cecb07d9c63295e0f42a1c622836855a19d32

[apacible, 2016-05-19 16:20:45]

Description was changed from

==========
[Media Router WebUI] Handle route details in incognito.

While we currently don't support split mode for the extension, we cannot do any
toplevel navigations with the component extension with extensionview. Thus,
anyone trying to view the route details in incognito mode will see a "This site
can't be reached" error message if there was custom controls available for the
route.

This change only shows the default route details description when the browser is
"off the record", aka in incognito mode.

BUG=604407

Review URL: https://codereview.chromium.org/1898953002

Cr-Commit-Position: refs/heads/master@{#388107}
(cherry picked from commit 34b4be50fde0e4a79798bab28a47acbadc0e6479)
==========

to

==========
[Media Router WebUI] Handle route details in incognito.

While we currently don't support split mode for the extension, we cannot do any
toplevel navigations with the component extension with extensionview. Thus,
anyone trying to view the route details in incognito mode will see a "This site
can't be reached" error message if there was custom controls available for the
route.

This change only shows the default route details description when the browser is
"off the record", aka in incognito mode.

BUG=604407

Review URL: https://codereview.chromium.org/1898953002

Cr-Commit-Position: refs/heads/master@{#388107}
(cherry picked from commit 34b4be50fde0e4a79798bab28a47acbadc0e6479)

Committed:
https://chromium.googlesource.com/chromium/src/+/cc5cecb07d9c63295e0f42a1c622...
==========

[apacible, 2016-05-19 16:20:46]

Committed patchset #1 (id:1) manually as
cc5cecb07d9c63295e0f42a1c622836855a19d32.