FrameGenerator should receive SurfaceInfo and use it in frame generation

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 38df6fa8d054985a91b2e1c85346371230ae3adb..373faa9f219a3fd4372383b0507cfdec81002f0f 100644
--- a/services/ui/ws/test_utils.cc
+++ b/services/ui/ws/test_utils.cc
@@ -154,16 +154,10 @@ TestPlatformDisplayFactory::CreatePlatformDisplay(
 
 // 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;
 }