Fix crash in ViewManager: fail gracefully when no ServiceProvider is

Fix crash in ViewManager: fail gracefully when no ServiceProvider is
sent when connecting to ViewManager.

R=sky@chromium.org, jamesr@chromium.org
BUG=

Committed: https://chromium.googlesource.com/external/mojo/+/672d02b21ab19e56df8329f73612bdcb259633c7

[jamesr, 2015-03-06 17:15:01]

jamesr@chromium.org changed reviewers:
+ sky@chromium.org

[jamesr, 2015-03-06 17:15:02]

r->sky to see if this makes sense

don't put "BUG=" in the patch description if you don't have a bug number

[sky, 2015-03-06 18:25:28]

https://codereview.chromium.org/989553002/diff/1/services/view_manager/view_m...
File services/view_manager/view_manager_app.cc (right):

https://codereview.chromium.org/989553002/diff/1/services/view_manager/view_m...
services/view_manager/view_manager_app.cc:48: // If no ServiceProvider has been
sent, refuse the connection.
This doesn't make sense. It is expected that the first connection is the window
manager and further that we can get WindowManagerInternal from it.

[sky, 2015-03-06 20:18:50]

Sorry, yes, I agree. LGTM

[etiennej_google, 2015-03-09 09:59:49]

Committed patchset #1 (id:1) manually as
672d02b21ab19e56df8329f73612bdcb259633c7 (presubmit successful).