Wires keeping the launcher up to date with the browser.

chrome/browser/ui/aura/launcher_icon_updater.h

Index: chrome/browser/ui/aura/launcher_icon_updater.h
diff --git a/chrome/browser/ui/aura/launcher_icon_updater.h b/chrome/browser/ui/aura/launcher_icon_updater.h
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+// 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.
+
+#ifndef CHROME_BROWSER_UI_AURA_LAUNCHER_ICON_UPDATER_H_
+#define CHROME_BROWSER_UI_AURA_LAUNCHER_ICON_UPDATER_H_
+#pragma once
+
+#include <deque>
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "chrome/browser/tabs/tab_strip_model_observer.h"
+
+namespace aura {
+class Window;
+}
+namespace aura_shell {
+class LauncherModel;
+}
+
+// LauncherIconUpdater is responsible for keeping the launcher representation
+// of a window up to date with the tabs.
+class LauncherIconUpdater : public TabStripModelObserver {
+ public:
+  LauncherIconUpdater(TabStripModel* tab_model,
+                      aura_shell::LauncherModel* launcher_model,
+                      aura::Window* window);
+  virtual ~LauncherIconUpdater();
+
+  // TabStripModel overrides:
+  virtual void TabInsertedAt(TabContentsWrapper* contents,
+                             int index,
+                             bool foreground) OVERRIDE;
+  virtual void TabDetachedAt(TabContentsWrapper* contents, int index) OVERRIDE;
+  virtual void TabSelectionChanged(
+      TabStripModel* tab_strip_model,
+      const TabStripSelectionModel& old_model) OVERRIDE;
+  virtual void TabChangedAt(
+      TabContentsWrapper* tab,
+      int index,
+      TabStripModelObserver::TabChangeType change_type) OVERRIDE;
+
+ private:
+  typedef std::deque<TabContentsWrapper*> Tabs;
+
+  // Updates the launcher from the current set of tabs.
+  void UpdateLauncher();
+
+  TabStripModel* tab_model_;
+
+  aura_shell::LauncherModel* launcher_model_;
+
+  aura::Window* window_;
+
+  // The tabs. This is an MRU cache of the tabs in the tabstrip model.
+  Tabs tabs_;
+
+  DISALLOW_COPY_AND_ASSIGN(LauncherIconUpdater);
+};
+
+#endif  // CHROME_BROWSER_UI_AURA_LAUNCHER_ICON_UPDATER_H_