Fix Launcher crash in ChromeOS guest mode.

chrome/browser/ui/app_list/app_list_view_delegate.cc

Index: chrome/browser/ui/app_list/app_list_view_delegate.cc
diff --git a/chrome/browser/ui/app_list/app_list_view_delegate.cc b/chrome/browser/ui/app_list/app_list_view_delegate.cc
index c40337660723557465cafd412a572d1a3c39a0f2..927f77108bfcee7e692ed7b872ea3904b01be5de 100644
--- a/chrome/browser/ui/app_list/app_list_view_delegate.cc
+++ b/chrome/browser/ui/app_list/app_list_view_delegate.cc
@@ -285,6 +285,12 @@ void AppListViewDelegate::SetProfile(Profile* new_profile) {
     return;
   }
 
+  // If we are in guest mode, the new profile should be an incognito profile.
+  // Otherwise, there will be trouble opening links in a browser window (see
+  // http://crbug.com/460437).
+  DCHECK(!profile_->IsGuestSession() || profile_->IsOffTheRecord())

[tapted, 2015/03/04 05:01:10]

perhaps worth noting in the comment that this is the same check as in
Browser::Browser()

[Matt Giuca, 2015/03/04 06:07:05]

Done.

+      << "Guest mode must use incognito profile";
+
   // TODO(vadimt): Remove ScopedTracker below once crbug.com/431326 is fixed.
   tracked_objects::ScopedTracker tracking_profile3(
       FROM_HERE_WITH_EXPLICIT_FUNCTION(