Add temporary TabStripWrapper interface that is implemented by both TabStrip ...

chrome/browser/views/frame/browser_root_view.h

Index: chrome/browser/views/frame/browser_root_view.h
===================================================================
--- chrome/browser/views/frame/browser_root_view.h	(revision 20183)
+++ chrome/browser/views/frame/browser_root_view.h	(working copy)
@@ -8,7 +8,7 @@
 #include "views/widget/root_view.h"
 
 class OSExchangeData;
-class TabStrip;
+class TabStripWrapper;
 
 // RootView implementation used by BrowserFrame. This forwards drop events to
 // the TabStrip. Visually the tabstrip extends to the top of the frame, but in
@@ -23,7 +23,7 @@
   // Sets the tabstrip associated with this window. This is used to forward
   // drag and drop operations to, so no drops will be accepted if there is no
   // tabstrip set.
-  void set_tabstrip(TabStrip* tabstrip) { tabstrip_ = tabstrip; }
+  void set_tabstrip(TabStripWrapper* tabstrip) { tabstrip_ = tabstrip; }
 
   virtual bool CanDrop(const OSExchangeData& data);
   virtual void OnDragEntered(const views::DropTargetEvent& event);
@@ -41,7 +41,7 @@
       const views::DropTargetEvent& event);
 
   // The TabStrip.
-  TabStrip* tabstrip_;
+  TabStripWrapper* tabstrip_;
 
   // Is a drop allowed? This is set by CanDrop.
   bool can_drop_;