Moves ImmersiveFullscreenController::SetupForTest into test class

chrome/browser/ui/views/frame/immersive_mode_controller_ash.cc

Index: chrome/browser/ui/views/frame/immersive_mode_controller_ash.cc
diff --git a/chrome/browser/ui/views/frame/immersive_mode_controller_ash.cc b/chrome/browser/ui/views/frame/immersive_mode_controller_ash.cc
index ce050c22395f4aa5741b04d2ea9ba96c8ece7362..e5865b582e79ae748147a5b3aa64658490549fc3 100644
--- a/chrome/browser/ui/views/frame/immersive_mode_controller_ash.cc
+++ b/chrome/browser/ui/views/frame/immersive_mode_controller_ash.cc
@@ -59,13 +59,13 @@ class ImmersiveRevealedLockAsh : public ImmersiveRevealedLock {
 }  // namespace
 
 ImmersiveModeControllerAsh::ImmersiveModeControllerAsh()
-    : controller_(new ash::ImmersiveFullscreenController),
+    : ImmersiveModeController(Type::ASH),
+      controller_(new ash::ImmersiveFullscreenController),
       browser_view_(nullptr),
       native_window_(nullptr),
       observers_enabled_(false),
       use_tab_indicators_(false),
-      visible_fraction_(1) {
-}
+      visible_fraction_(1) {}
 
 ImmersiveModeControllerAsh::~ImmersiveModeControllerAsh() {
   EnableWindowObservers(false);
@@ -133,10 +133,6 @@ void ImmersiveModeControllerAsh::OnFindBarVisibleBoundsChanged(
   find_bar_visible_bounds_in_screen_ = new_visible_bounds_in_screen;
 }
 
-void ImmersiveModeControllerAsh::SetupForTest() {
-  controller_->SetupForTest();
-}
-
 void ImmersiveModeControllerAsh::EnableWindowObservers(bool enable) {
   if (observers_enabled_ == enable)
     return;