Move signin status and current user information into AppListModel.

ui/app_list/test/app_list_test_model.cc

Index: ui/app_list/test/app_list_test_model.cc
diff --git a/ui/app_list/test/app_list_test_model.cc b/ui/app_list/test/app_list_test_model.cc
index 67331f36232a2f8bcb1b1b0cfd6df53a5070fdb5..c320a0ca6176ecbbe5698125822a6f856104b758 100644
--- a/ui/app_list/test/app_list_test_model.cc
+++ b/ui/app_list/test/app_list_test_model.cc
@@ -10,6 +10,10 @@
 namespace app_list {
 namespace test {
 
+AppListTestModel::AppListTestModel() {
+  SetSignedIn(true);
+}
+
 void AppListTestModel::PopulateApps(int n) {
   for (int i = 0; i < n; ++i)
     AddItem(base::StringPrintf("Item %d", i));