Refactor implementation of BrowserActions, and add support for

chrome/common/extensions/extension_action2.cc

+// Copyright (c) 2009 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/common/extensions/extension_action2.h"
+
+#include "base/logging.h"
+
+const int ExtensionAction2::kDefaultTabId = -1;
+
+void ExtensionAction2::SetDefaultIcon(const std::string& path) {
+  default_icon_path_ = path;
+  icon_.erase(kDefaultTabId);
+}
+
+void ExtensionAction2::SetDefaultIcon(int icon_index) {
+  if (static_cast<size_t>(icon_index) >= icon_paths_.size()) {
+    NOTREACHED();
+    return;
+  }
+
+  SetDefaultIcon(icon_paths_[icon_index]);
+}
+
+void ExtensionAction2::ClearAllValuesForTab(int tab_id) {
+  title_.erase(tab_id);
+  icon_.erase(tab_id);
+  badge_text_.erase(tab_id);
+  badge_background_color_.erase(tab_id);
+  badge_text_color_.erase(tab_id);
+}