Revert r42156, r42157, r42160. Allow dynamic switching in and out of sidetabs...

chrome/browser/tabs/tab_strip_model_unittest.cc

 // Copyright (c) 2006-2008 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 "app/system_monitor.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/string_util.h"
 #include "base/stl_util-inl.h"
@@ skipping 52 matching lines @@
   virtual void CloseFrameAfterDragSession() {}
   virtual void CreateHistoricalTab(TabContents* contents) {}
   virtual bool RunUnloadListenerBeforeClosing(TabContents* contents) {
     return run_unload_;
   }
   virtual bool CanRestoreTab() { return false; }
   virtual void RestoreTab() {}
   virtual bool CanCloseContentsAt(int index) { return can_close_ ; }
   virtual bool CanBookmarkAllTabs() const { return false; }
   virtual void BookmarkAllTabs() {}
-  virtual bool UseVerticalTabs() const { return false; }
-  virtual void ToggleUseVerticalTabs() {}
 
  private:
   // A dummy TabContents we give to callers that expect us to actually build a
   // Destinations tab for them.
   TabContents* dummy_contents_;
 
   // Whether tabs can be closed.
   bool can_close_;
 
   // Whether to report that we need to run an unload listener before closing.
@@ skipping 1660 matching lines @@
     state.src_contents = old_contents3;
     EXPECT_TRUE(observer.StateEquals(1, state));
     EXPECT_TRUE(observer.empty());
 
     observer.ClearStates();
   }
 
   // Clean up the phantom tabs.
   tabstrip.CloseAllTabs();
 }