Don't dispatch window focus change events to other profiles.

BUG=138901


Review URL: https://chromiumcodereview.appspot.com/10832063

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@148985 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/extensions/window_event_router.cc

@@ -152,6 +152,10 @@ void WindowEventRouter::OnActiveWindowChanged(
 
   if (!window_profile)
     window_profile = previous_focused_profile;
+  if (!profile_->IsSameProfile(window_profile) ||
+      !ExtensionSystem::Get(window_profile)->event_router()) {
+    return;
+  }
 
   ExtensionSystem::Get(window_profile)->event_router()->
       DispatchEventsToRenderersAcrossIncognito(