Move Mus into chrome's process when running with --mus.

services/ui/ws/platform_display.cc

Index: services/ui/ws/platform_display.cc
diff --git a/services/ui/ws/platform_display.cc b/services/ui/ws/platform_display.cc
index 587e4508e446f6ba96bf234413ab5a9834e06c3b..92ab3dd9f04b63a18e56b5a75f5937987ca63467 100644
--- a/services/ui/ws/platform_display.cc
+++ b/services/ui/ws/platform_display.cc
@@ -8,7 +8,8 @@
 #include "services/ui/ws/platform_display_default.h"
 #include "services/ui/ws/platform_display_factory.h"
 #include "services/ui/ws/server_window.h"
-#include "ui/base/cursor/image_cursors.h"
+#include "services/ui/ws/threaded_image_cursors.h"
+#include "services/ui/ws/threaded_image_cursors_factory.h"
 
 namespace ui {
 namespace ws {
@@ -19,7 +20,8 @@ PlatformDisplayFactory* PlatformDisplay::factory_ = nullptr;
 // static
 std::unique_ptr<PlatformDisplay> PlatformDisplay::Create(
     ServerWindow* root,
-    const display::ViewportMetrics& metrics) {
+    const display::ViewportMetrics& metrics,
+    ThreadedImageCursorsFactory* threaded_image_cursors_factory) {
   if (factory_)
     return factory_->CreatePlatformDisplay(root, metrics);
 
@@ -28,7 +30,7 @@ std::unique_ptr<PlatformDisplay> PlatformDisplay::Create(
                                                   nullptr /* image_cursors */);
 #else
   return base::MakeUnique<PlatformDisplayDefault>(
-      root, metrics, base::MakeUnique<ImageCursors>());
+      root, metrics, threaded_image_cursors_factory->CreateCursors());
 #endif
 }