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

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

 // Copyright 2013 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_FRAME_IMMERSIVE_MODE_CONTROLLER_STUB_H_
 #define CHROME_BROWSER_UI_VIEWS_FRAME_IMMERSIVE_MODE_CONTROLLER_STUB_H_
 
 #include "chrome/browser/ui/views/frame/immersive_mode_controller.h"
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 
 // Stub implementation of ImmersiveModeController for platforms which do not
 // support immersive mode yet.
 class ImmersiveModeControllerStub : public ImmersiveModeController {
  public:
   ImmersiveModeControllerStub();
   ~ImmersiveModeControllerStub() override;
 
   // ImmersiveModeController overrides:
   void Init(BrowserView* browser_view) override;
   void SetEnabled(bool enabled) override;
   bool IsEnabled() const override;
-  bool ShouldHideTabIndicators() const override;
   bool ShouldHideTopViews() const override;
   bool IsRevealed() const override;
   int GetTopContainerVerticalOffset(
       const gfx::Size& top_container_size) const override;
   ImmersiveRevealedLock* GetRevealedLock(AnimateReveal animate_reveal) override
       WARN_UNUSED_RESULT;
   void OnFindBarVisibleBoundsChanged(
       const gfx::Rect& new_visible_bounds_in_screen) override;
   views::Widget* GetRevealWidget() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ImmersiveModeControllerStub);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_FRAME_IMMERSIVE_MODE_CONTROLLER_STUB_H_