Changes code using Compositor to pass in ContextFactory

ash/host/ash_window_tree_host_ozone.cc

Index: ash/host/ash_window_tree_host_ozone.cc
diff --git a/ash/host/ash_window_tree_host_ozone.cc b/ash/host/ash_window_tree_host_ozone.cc
index 6fd0b26cd647a89753c8cbe116548926af2f1f83..958d57ef607dc2ccc8d0f3cd655edcc1c993dfc0 100644
--- a/ash/host/ash_window_tree_host_ozone.cc
+++ b/ash/host/ash_window_tree_host_ozone.cc
@@ -18,8 +18,10 @@ namespace {
 class AshWindowTreeHostOzone : public AshWindowTreeHost,
                                public aura::WindowTreeHostOzone {
  public:
-  explicit AshWindowTreeHostOzone(const gfx::Rect& initial_bounds);
-  virtual ~AshWindowTreeHostOzone();
+  AshWindowTreeHostOzone(const gfx::Rect& initial_bounds,
+                         ui::ContextFactory* context_factory)
+      : aura::WindowTreeHostOzone(initial_bounds, context_factory) {}
+  virtual ~AshWindowTreeHostOzone() {}
 
  private:
   // AshWindowTreeHost:
@@ -91,7 +93,8 @@ void AshWindowTreeHostOzone::UpdateRootWindowSize(const gfx::Size& host_size) {
 
 AshWindowTreeHost* AshWindowTreeHost::Create(
     const AshWindowTreeHostInitParams& init_params) {
-  return new AshWindowTreeHostOzone(init_params.initial_bounds);
+  return new AshWindowTreeHostOzone(init_params.initial_bounds,
+                                    init_params.context_factory);
 }
 
 }  // namespace ash