Move immersive fullscreen check into ImmersiveFullscreenConfiguration.

chrome/browser/ui/views/frame/immersive_mode_controller.h

Index: chrome/browser/ui/views/frame/immersive_mode_controller.h
diff --git a/chrome/browser/ui/views/frame/immersive_mode_controller.h b/chrome/browser/ui/views/frame/immersive_mode_controller.h
index 3a7a1827cf8afba046a9e36dc97e5c25a8498292..504f9e346c1064c8fdf797d0fbdd004fa0002984 100644
--- a/chrome/browser/ui/views/frame/immersive_mode_controller.h
+++ b/chrome/browser/ui/views/frame/immersive_mode_controller.h
@@ -118,14 +118,6 @@ class ImmersiveModeController {
 
 namespace chrome {
 
-// Returns true if immersive mode should be used for fullscreen based on
-// command line flags.
-// Implemented in immersive_mode_controller_factory.cc.
-bool UseImmersiveFullscreen();
-
-// Implemented in immersive_mode_controller_factory.cc.
-void EnableImmersiveFullscreenForTest();
-
 // Implemented in immersive_mode_controller_factory.cc.
 ImmersiveModeController* CreateImmersiveModeController();