Makes BrowserStatusMonitor remove observers in destructor

chrome/browser/ui/ash/launcher/browser_shortcut_launcher_item_controller.cc

Index: chrome/browser/ui/ash/launcher/browser_shortcut_launcher_item_controller.cc
diff --git a/chrome/browser/ui/ash/launcher/browser_shortcut_launcher_item_controller.cc b/chrome/browser/ui/ash/launcher/browser_shortcut_launcher_item_controller.cc
index 706356e815c5371586000d630f488ff36136b456..5e1e8c59e9b7bd53f8854a28e92e6eb6d583554b 100644
--- a/chrome/browser/ui/ash/launcher/browser_shortcut_launcher_item_controller.cc
+++ b/chrome/browser/ui/ash/launcher/browser_shortcut_launcher_item_controller.cc
@@ -272,7 +272,7 @@ void BrowserShortcutLauncherItemController::ActivateOrAdvanceToNextBrowser() {
       items.push_back(*it);
   }
   // If there are no suitable browsers we create a new one.
-  if (!items.size()) {
+  if (items.empty()) {
     launcher_controller()->CreateNewWindow();
     return;
   }
@@ -288,8 +288,8 @@ void BrowserShortcutLauncherItemController::ActivateOrAdvanceToNextBrowser() {
     browser = items[0];
   } else {
     // If there is more then one suitable browser, we advance to the next if
-    // |current_browser| is already active - or - check the last used browser
-    // if it can be used.
+    // |browser| is already active - or - check the last used browser if it can
+    // be used.
     std::vector<Browser*>::iterator i =
         std::find(items.begin(), items.end(), browser);
     if (i != items.end()) {
@@ -311,6 +311,7 @@ void BrowserShortcutLauncherItemController::ActivateOrAdvanceToNextBrowser() {
 bool BrowserShortcutLauncherItemController::IsBrowserRepresentedInBrowserList(
     Browser* browser) {
   return (browser &&
+          browser->host_desktop_type() == chrome::HOST_DESKTOP_TYPE_ASH &&
           (browser->is_type_tabbed() ||
            !browser->is_app() ||
            !browser->is_type_popup() ||