Revert 90359 - Helper functions for tracking stale TabContentsDelegate's.

content/browser/tab_contents/tab_contents_delegate.h

Index: content/browser/tab_contents/tab_contents_delegate.h
===================================================================
--- content/browser/tab_contents/tab_contents_delegate.h	(revision 90360)
+++ content/browser/tab_contents/tab_contents_delegate.h	(working copy)
@@ -6,7 +6,6 @@
 #define CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_DELEGATE_H_
 #pragma once
 
-#include <set>
 #include <string>
 
 #include "base/basictypes.h"
@@ -42,8 +41,6 @@
 // TabContents and to provide necessary functionality.
 class TabContentsDelegate {
  public:
-  TabContentsDelegate();
-
   // When a main frame navigation occurs CreateMainFrameCommitDetails() is
   // invoked. The |MainFrameCommitDetails| returned from
   // CreateMainFrameCommitDetails() are then passed to
@@ -307,18 +304,6 @@
 
  protected:
   virtual ~TabContentsDelegate();
-
- private:
-  friend class TabContents;
-
-  // Called when |this| becomes the TabContentsDelegate for |source|.
-  void Attach(TabContents* source);
-
-  // Called when |this| is no longer the TabContentsDelegate for |source|.
-  void Detach(TabContents* source);
-
-  // The TabContents that this is currently a delegate for.
-  std::set<TabContents*> attached_contents_;
 };
 
 #endif  // CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_DELEGATE_H_