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

content/browser/tab_contents/tab_contents_delegate.cc

Index: content/browser/tab_contents/tab_contents_delegate.cc
===================================================================
--- content/browser/tab_contents/tab_contents_delegate.cc	(revision 90360)
+++ content/browser/tab_contents/tab_contents_delegate.cc	(working copy)
@@ -5,15 +5,11 @@
 #include "content/browser/tab_contents/tab_contents_delegate.h"
 
 #include "base/compiler_specific.h"
-#include "base/logging.h"
 #include "base/memory/singleton.h"
 #include "content/browser/javascript_dialogs.h"
 #include "content/common/url_constants.h"
 #include "ui/gfx/rect.h"
 
-TabContentsDelegate::TabContentsDelegate() {
-}
-
 std::string TabContentsDelegate::GetNavigationHeaders(const GURL& url) {
   return std::string();
 }
@@ -238,15 +234,4 @@
 }
 
 TabContentsDelegate::~TabContentsDelegate() {
-  CHECK(attached_contents_.empty());
 }
-
-void TabContentsDelegate::Attach(TabContents* tab_contents) {
-  CHECK(attached_contents_.find(tab_contents) == attached_contents_.end());
-  attached_contents_.insert(tab_contents);
-}
-
-void TabContentsDelegate::Detach(TabContents* tab_contents) {
-  CHECK(attached_contents_.find(tab_contents) != attached_contents_.end());
-  attached_contents_.erase(tab_contents);
-}