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

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

 // 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.
 
 #include "chrome/browser/ui/views/tabs/tab.h"
 
 #include <stddef.h>
 
 #include "base/macros.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/ui/layout_constants.h"
 #include "chrome/browser/ui/tabs/tab_utils.h"
 #include "chrome/browser/ui/views/tabs/alert_indicator_button.h"
 #include "chrome/browser/ui/views/tabs/tab_controller.h"
 #include "chrome/grit/theme_resources.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/base/models/list_selection_model.h"
 #include "ui/views/controls/button/image_button.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/test/views_test_base.h"
 #include "ui/views/widget/widget.h"
 
 using views::Widget;
 
 class FakeTabController : public TabController {
  public:
   FakeTabController() {}
 
-  void set_immersive_style(bool value) { immersive_style_ = value; }
   void set_active_tab(bool value) { active_tab_ = value; }
   void set_paint_throbber_to_layer(bool value) {
     paint_throbber_to_layer_ = value;
   }
 
   const ui::ListSelectionModel& GetSelectionModel() const override {
     return selection_model_;
   }
   bool SupportsMultipleSelection() override { return false; }
   bool ShouldHideCloseButtonForInactiveTabs() override {
@@ skipping 26 matching lines @@
                          const ui::MouseEvent& event) override {}
   bool ShouldPaintTab(
       const Tab* tab,
       const base::Callback<gfx::Path(const gfx::Size&)>& border_callback,
       gfx::Path* clip) override {
     return true;
   }
   bool CanPaintThrobberToLayer() const override {
     return paint_throbber_to_layer_;
   }
-  bool IsImmersiveStyle() const override { return immersive_style_; }
   SkColor GetToolbarTopSeparatorColor() const override { return SK_ColorBLACK; }
   int GetBackgroundResourceId(bool* custom_image) const override {
     *custom_image = false;
     return IDR_THEME_TAB_BACKGROUND;
   }
   void UpdateTabAccessibilityState(const Tab* tab,
                                    ui::AXNodeData* node_data) override{};
   base::string16 GetAccessibleTabName(const Tab* tab) const override {
     return base::string16();
   }
 
  private:
   ui::ListSelectionModel selection_model_;
-  bool immersive_style_ = false;
   bool active_tab_ = false;
   bool paint_throbber_to_layer_ = true;
 
   DISALLOW_COPY_AND_ASSIGN(FakeTabController);
 };
 
 class TabTest : public views::ViewsTestBase {
  public:
   TabTest() {}
   ~TabTest() override {}
@@ skipping 390 matching lines @@
 }
 
 TEST_F(TabTest, TitleHiddenWhenSmall) {
   FakeTabController tab_controller;
   Tab tab(&tab_controller, nullptr);
   tab.SetBounds(0, 0, 100, 50);
   EXPECT_GT(GetTitleWidth(tab), 0);
   tab.SetBounds(0, 0, 0, 50);
   EXPECT_EQ(0, GetTitleWidth(tab));
 }