Remove BlimpUiContextFactory

blimp/engine/session/blimp_engine_session.h

Index: blimp/engine/session/blimp_engine_session.h
diff --git a/blimp/engine/session/blimp_engine_session.h b/blimp/engine/session/blimp_engine_session.h
index 1298c77036fc52614564f5792f9d211d293697dc..75bde2ec5e1c81547b75b3d19853e7993e973831 100644
--- a/blimp/engine/session/blimp_engine_session.h
+++ b/blimp/engine/session/blimp_engine_session.h
@@ -61,7 +61,6 @@ class BlimpBrowserContext;
 class BlimpEngineConfig;
 class BlimpFocusClient;
 class BlimpScreen;
-class BlimpUiContextFactory;
 class BlimpWindowTreeHost;
 class EngineNetworkComponents;
 
@@ -161,9 +160,6 @@ class BlimpEngineSession
   // Presents the client's single screen.
   scoped_ptr<BlimpScreen> screen_;
 
-  // Context factory for compositor.
-  scoped_ptr<BlimpUiContextFactory> context_factory_;
-
   // Represents the (currently single) browser window into which tab(s) will
   // be rendered.
   scoped_ptr<BlimpWindowTreeHost> window_tree_host_;