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

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

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_TABS_TAB_CONTROLLER_H_
 #define CHROME_BROWSER_UI_VIEWS_TABS_TAB_CONTROLLER_H_
 
 #include "base/callback_forward.h"
 #include "chrome/browser/ui/views/tabs/tab_strip_types.h"
 #include "third_party/skia/include/core/SkColor.h"
@@ skipping 95 matching lines @@
   virtual bool ShouldPaintTab(
       const Tab* tab,
       const base::Callback<gfx::Path(const gfx::Size&)>& border_callback,
       gfx::Path* clip) = 0;
 
   // Returns true if tab loading throbbers can be painted to a composited layer.
   // This can only be done when the TabController can guarantee that nothing
   // 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;
 
   // Returns the resource ID for the image to use as the tab background.
   // |custom_image| is an outparam set to true if either the tab or the frame
   // background images have been customized; see implementation comments.
   virtual int GetBackgroundResourceId(bool* custom_image) const = 0;
 
   // Adds private information to the tab's accessibility state.
   virtual void UpdateTabAccessibilityState(const Tab* tab,
                                            ui::AXNodeData* node_data) = 0;
 
   // Returns the accessible tab name for this tab.
   virtual base::string16 GetAccessibleTabName(const Tab* tab) const = 0;
 
  protected:
   virtual ~TabController() {}
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_TAB_CONTROLLER_H_