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

chrome/browser/views/tabs/side_tab.h

Index: chrome/browser/views/tabs/side_tab.h
===================================================================
--- chrome/browser/views/tabs/side_tab.h	(revision 42174)
+++ chrome/browser/views/tabs/side_tab.h	(working copy)
@@ -26,13 +26,9 @@
 
   // Closes the tab.
   virtual void CloseTab(SideTab* tab) = 0;
-
-  // Shows a context menu for the tab at the specified point in screen coords.
-  virtual void ShowContextMenu(SideTab* tab, const gfx::Point& p) = 0;
 };
 
 class SideTab : public views::View,
-                public views::ContextMenuController,
                 public views::ButtonListener,
                 public AnimationDelegate {
  public:
@@ -52,11 +48,6 @@
   // views::ButtonListener implementation:
   virtual void ButtonPressed(views::Button* sender, const views::Event& event);
 
-  // views::ContextMenuController implementation:
-  virtual void ShowContextMenu(views::View* source,
-                               const gfx::Point& p,
-                               bool is_mouse_gesture);
-
   // views::View Overrides:
   virtual void Layout();
   virtual void Paint(gfx::Canvas* canvas);