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

chrome/browser/views/tabs/side_tab_strip.h

Index: chrome/browser/views/tabs/side_tab_strip.h
===================================================================
--- chrome/browser/views/tabs/side_tab_strip.h	(revision 42174)
+++ chrome/browser/views/tabs/side_tab_strip.h	(working copy)
@@ -25,6 +25,10 @@
   // command line flag that allows the SideTabStrip to be optionally shown.
   static bool Available();
 
+  // Whether or not the vertical tabstrip is shown. Only valid if Available()
+  // returns true.
+  static bool Visible(Profile* profile);
+
   // Notifies the SideTabStrip that a tab was added in the model at |index|.
   void AddTabAt(int index);
 
@@ -44,7 +48,6 @@
   virtual bool IsSelected(SideTab* tab) const;
   virtual void SelectTab(SideTab* tab);
   virtual void CloseTab(SideTab* tab);
-  virtual void ShowContextMenu(SideTab* tab, const gfx::Point& p);
 
   // BaseTabStrip implementation:
   virtual int GetPreferredHeight();