Shell of implementation for embedded windows. At this point this is

views/view_unittest.cc

Index: views/view_unittest.cc
diff --git a/views/view_unittest.cc b/views/view_unittest.cc
index 0309ada5a0d6d772cb57db78ef170de72afb97f5..4b3fcfe5390f6fa9a56d7e4d2b48df77ccfe856a 100644
--- a/views/view_unittest.cc
+++ b/views/view_unittest.cc
@@ -2398,7 +2398,7 @@ class ViewLayerTest : public ViewsTestBase {
 
     TestTexture::reset_live_count();
 
-    Widget::set_compositor_factory(&TestCreateCompositor);
+    Widget::set_compositor_factory_for_testing(&TestCreateCompositor);
     widget_ = new Widget;
     Widget::InitParams params(Widget::InitParams::TYPE_POPUP);
     params.bounds = gfx::Rect(50, 50, 200, 200);
@@ -2408,7 +2408,7 @@ class ViewLayerTest : public ViewsTestBase {
   virtual void TearDown() OVERRIDE {
     View::set_use_acceleration_when_possible(old_use_acceleration_);
     widget_->CloseNow();
-    Widget::set_compositor_factory(NULL);
+    Widget::set_compositor_factory_for_testing(NULL);
     Widget::SetPureViews(false);
   }