Changes code using Compositor to pass in ContextFactory

ash/display/mirror_window_controller.cc

Index: ash/display/mirror_window_controller.cc
diff --git a/ash/display/mirror_window_controller.cc b/ash/display/mirror_window_controller.cc
index 32d92294a43c7d3a7d7ab3e30ee1d58412ed0413..89e4213abbc162034b8c19fd001ae5c0524d6843 100644
--- a/ash/display/mirror_window_controller.cc
+++ b/ash/display/mirror_window_controller.cc
@@ -72,7 +72,9 @@ class NoneCaptureClient : public aura::client::CaptureClient {
 
 }  // namespace
 
-MirrorWindowController::MirrorWindowController() {}
+MirrorWindowController::MirrorWindowController(
+    ui::ContextFactory* context_factory)
+    : context_factory_(context_factory) {}
 
 MirrorWindowController::~MirrorWindowController() {
   // Make sure the root window gets deleted before cursor_window_delegate.
@@ -84,6 +86,7 @@ void MirrorWindowController::UpdateWindow(const DisplayInfo& display_info) {
   if (!ash_host_.get()) {
     AshWindowTreeHostInitParams init_params;
     init_params.initial_bounds = display_info.bounds_in_native();
+    init_params.context_factory = context_factory_;
     ash_host_.reset(AshWindowTreeHost::Create(init_params));
     aura::WindowTreeHost* host = ash_host_->AsWindowTreeHost();
     host->window()->SetName(