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/logging.h"
 #include "base/memory/singleton.h"
 #include "content/browser/javascript_dialogs.h"
 #include "content/common/url_constants.h"
 #include "ui/gfx/rect.h"
 
+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);
+}
+
 std::string TabContentsDelegate::GetNavigationHeaders(const GURL& url) {
   return std::string();
 }
 
 void TabContentsDelegate::LoadProgressChanged(double progress) {
 }
 
 void TabContentsDelegate::DetachContents(TabContents* source) {
 }
 
@@ skipping 208 matching lines @@
  private:
   friend struct DefaultSingletonTraits<JavaScriptDialogCreatorStub>;
 };
 
 content::JavaScriptDialogCreator*
 TabContentsDelegate::GetJavaScriptDialogCreator() {
   return JavaScriptDialogCreatorStub::GetInstance();
 }
 
 TabContentsDelegate::~TabContentsDelegate() {
+  CHECK(attached_contents_.empty());
 }