[Extensions] Propagate activeTab hosts to extension background pages

chrome/renderer/extensions/tab_finder.cc

Index: chrome/renderer/extensions/tab_finder.cc
diff --git a/chrome/renderer/extensions/tab_finder.cc b/chrome/renderer/extensions/tab_finder.cc
deleted file mode 100644
index 6884622d586ce382ed024b41ba2ab4bcda3b2e5d..0000000000000000000000000000000000000000
--- a/chrome/renderer/extensions/tab_finder.cc
+++ /dev/null
@@ -1,40 +0,0 @@
-// Copyright (c) 2012 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 "chrome/renderer/extensions/tab_finder.h"
-
-#include "content/public/renderer/render_view.h"
-#include "extensions/renderer/extension_helper.h"
-#include "third_party/WebKit/public/web/WebFrame.h"
-#include "third_party/WebKit/public/web/WebView.h"
-
-using content::RenderView;
-
-namespace extensions {
-
-// static
-content::RenderView* TabFinder::Find(int tab_id) {
-  TabFinder finder(tab_id);
-  RenderView::ForEach(&finder);
-  return finder.view_;
-}
-
-TabFinder::TabFinder(int tab_id) : tab_id_(tab_id), view_(NULL) {}
-
-TabFinder::~TabFinder() {}
-
-// Note: Visit returns false to terminate the iteration.
-bool TabFinder::Visit(RenderView* render_view) {
-  // Only interested in the top frame.
-  if (render_view->GetWebView()->mainFrame()->parent())
-    return true;
-
-  ExtensionHelper* helper = ExtensionHelper::Get(render_view);
-  if (helper && helper->tab_id() == tab_id_)
-    view_ = render_view;
-
-  return !view_;
-}
-
-}  // namespace extensions