Changes code using Compositor to pass in ContextFactory

ash/display/display_controller.h

Index: ash/display/display_controller.h
diff --git a/ash/display/display_controller.h b/ash/display/display_controller.h
index 00c1ac60309ac718e18964cc8ecaa4d66f4d4d84..d70350600dad7a2ecd355eba55ccafe23be9dbbe 100644
--- a/ash/display/display_controller.h
+++ b/ash/display/display_controller.h
@@ -36,6 +36,10 @@ class Display;
 class Insets;
 }
 
+namespace ui {
+class ContextFactory;
+}
+
 namespace ash {
 class AshWindowTreeHost;
 struct AshWindowTreeHostInitParams;
@@ -71,7 +75,7 @@ class ASH_EXPORT DisplayController : public gfx::DisplayObserver,
     virtual ~Observer() {}
   };
 
-  DisplayController();
+  explicit DisplayController(ui::ContextFactory* context_factory);
   virtual ~DisplayController();
 
   void Start();
@@ -195,6 +199,8 @@ class ASH_EXPORT DisplayController : public gfx::DisplayObserver,
     DISALLOW_COPY_AND_ASSIGN(DisplayChangeLimiter);
   };
 
+  ui::ContextFactory* context_factory_;
+
   // The limiter to throttle how fast a user can
   // change the display configuration.
   scoped_ptr<DisplayChangeLimiter> limiter_;