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

chrome/browser/ui/views/tabs/tab_controller.h

Index: chrome/browser/ui/views/tabs/tab_controller.h
diff --git a/chrome/browser/ui/views/tabs/tab_controller.h b/chrome/browser/ui/views/tabs/tab_controller.h
index 872c16903a1c81dcb77db2337874c01b45c7b85c..785183ed3990b8c352652444b55db3cff50e88bc 100644
--- a/chrome/browser/ui/views/tabs/tab_controller.h
+++ b/chrome/browser/ui/views/tabs/tab_controller.h
@@ -113,9 +113,6 @@ class TabController {
   // in the same window will redraw on top of the the favicon area of any tab.
   virtual bool CanPaintThrobberToLayer() const = 0;
 
-  // Returns true if tabs should be painted in the rectangular light-bar style.
-  virtual bool IsImmersiveStyle() const = 0;
-
   // Returns COLOR_TOOLBAR_TOP_SEPARATOR[,_INACTIVE] depending on the activation
   // state of the window.
   virtual SkColor GetToolbarTopSeparatorColor() const = 0;