Changes code using Compositor to pass in ContextFactory

ash/test/ash_test_base.h

Index: ash/test/ash_test_base.h
diff --git a/ash/test/ash_test_base.h b/ash/test/ash_test_base.h
index 6ef1591edae0aa25bec582ccf5996ce97f51a34b..c50bf2fd36414f7046227cf04359c8cb19cb9b16 100644
--- a/ash/test/ash_test_base.h
+++ b/ash/test/ash_test_base.h
@@ -33,6 +33,10 @@ class EventGenerator;
 }  // namespace test
 }  // namespace aura
 
+namespace ui {
+class ContextFactory;
+}
+
 namespace ash {
 class DisplayManager;
 
@@ -88,6 +92,8 @@ class AshTestBase : public testing::Test {
   // hasn't been created yet.
   aura::test::EventGenerator& GetEventGenerator();
 
+  ui::ContextFactory* context_factory();
+
  protected:
   enum UserSessionBlockReason {
     FIRST_BLOCK_REASON,