Helper functions for tracking stale TabContentsDelegate's.

content/browser/tab_contents/tab_contents_delegate.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/tab_contents/tab_contents_delegate.h"
 
 #include "base/compiler_specific.h"
 #include "base/memory/singleton.h"
 #include "content/browser/javascript_dialogs.h"
 #include "content/common/url_constants.h"
@@ skipping 219 matching lines @@
   }
  private:
   friend struct DefaultSingletonTraits<JavaScriptDialogCreatorStub>;
 };
 
 content::JavaScriptDialogCreator*
 TabContentsDelegate::GetJavaScriptDialogCreator() {
   return JavaScriptDialogCreatorStub::GetInstance();
 }
 
+void TabContentsDelegate::Attach(TabContents* tab_contents) {

[sky, 2011/06/23 18:27:32]

Position should match header.

[cbentzel, 2011/06/23 18:38:13]

Done.

+  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);
+}
+
 TabContentsDelegate::~TabContentsDelegate() {
+  CHECK(attached_contents_.empty());
 }