cros-md: Remove the non-MD immersive mode code paths

chrome/browser/ui/views/tabs/tab_drag_controller_interactive_uitest.cc

Index: chrome/browser/ui/views/tabs/tab_drag_controller_interactive_uitest.cc
diff --git a/chrome/browser/ui/views/tabs/tab_drag_controller_interactive_uitest.cc b/chrome/browser/ui/views/tabs/tab_drag_controller_interactive_uitest.cc
index 3f0edc3d7128169fe4240bbb97ec47eaad1642df..ebfe2329221fac7617a2881a5a28234af636ecca 100644
--- a/chrome/browser/ui/views/tabs/tab_drag_controller_interactive_uitest.cc
+++ b/chrome/browser/ui/views/tabs/tab_drag_controller_interactive_uitest.cc
@@ -63,7 +63,6 @@
 
 #if defined(USE_ASH)
 #include "ash/common/ash_switches.h"
-#include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/wm/root_window_finder.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm_window.h"
@@ -2104,10 +2103,6 @@ IN_PROC_BROWSER_TEST_P(DetachToBrowserInSeparateDisplayTabDragControllerTest,
   ASSERT_TRUE(immersive_controller2->IsEnabled());
   ASSERT_FALSE(immersive_controller2->IsRevealed());
   ASSERT_TRUE(tab_strip2->visible());
-  bool is_using_material_design =
-      ash::MaterialDesignController::IsImmersiveModeMaterial();
-  if (!is_using_material_design)
-    ASSERT_TRUE(tab_strip2->IsImmersiveStyle());
 
   // Move to the first tab and drag it enough so that it detaches, but not
   // enough that it attaches to browser2.
@@ -2127,7 +2122,6 @@ IN_PROC_BROWSER_TEST_P(DetachToBrowserInSeparateDisplayTabDragControllerTest,
   // browser2's top chrome should be revealed and the tab strip should be
   // at normal height while user is tragging tabs_strip2's tabs.
   ASSERT_TRUE(immersive_controller2->IsRevealed());
-  ASSERT_FALSE(tab_strip2->IsImmersiveStyle());
   ASSERT_TRUE(tab_strip2->visible());
 
   // Release the mouse, stopping the drag session.
@@ -2152,8 +2146,6 @@ IN_PROC_BROWSER_TEST_P(DetachToBrowserInSeparateDisplayTabDragControllerTest,
   EXPECT_TRUE(immersive_controller2->IsEnabled());
   EXPECT_FALSE(immersive_controller2->IsRevealed());
   EXPECT_TRUE(tab_strip2->visible());
-  if (!is_using_material_design)
-    EXPECT_TRUE(tab_strip2->IsImmersiveStyle());
 }
 
 // Subclass of DetachToBrowserTabDragControllerTest that