Revert of Mustash: Ensure surfaces submitted to Mus by WM and embedders contain Surfaces with embeded content.

services/ui/ws/test_utils.cc

Index: services/ui/ws/test_utils.cc
diff --git a/services/ui/ws/test_utils.cc b/services/ui/ws/test_utils.cc
index 5c50fae5d6c7fb6a3fd0e1feed5bc40dcd6b074d..947f0898323dedc43f468db10c834b8ab244fd38 100644
--- a/services/ui/ws/test_utils.cc
+++ b/services/ui/ws/test_utils.cc
@@ -151,15 +151,9 @@
 
 // TestFrameGeneratorDelegate -------------------------------------------------
 
-TestFrameGeneratorDelegate::TestFrameGeneratorDelegate(
-    ServerWindow* root_window)
-    : root_window_(root_window) {}
+TestFrameGeneratorDelegate::TestFrameGeneratorDelegate() {}
 
 TestFrameGeneratorDelegate::~TestFrameGeneratorDelegate() {}
-
-ServerWindow* TestFrameGeneratorDelegate::GetActiveRootWindow() {
-  return root_window_;
-}
 
 bool TestFrameGeneratorDelegate::IsInHighContrastMode() {
   return false;