Remove LauncherItemController::Launch, cleanup.

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 da46397ff11406867544f9617056b9993a918e74..0a838d626474ba60ff7c683a13254f9509ca1e65 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
@@ -64,13 +64,12 @@ BrowserShortcutLauncherItemController::BrowserShortcutLauncherItemController(
     ChromeLauncherController* launcher_controller,
     ash::ShelfModel* shelf_model)
     : LauncherItemController(extension_misc::kChromeAppId,
-                             "",
+                             std::string(),
                              launcher_controller),
       shelf_model_(shelf_model) {}
 
 BrowserShortcutLauncherItemController::
-    ~BrowserShortcutLauncherItemController() {
-}
+    ~BrowserShortcutLauncherItemController() {}
 
 void BrowserShortcutLauncherItemController::UpdateBrowserItemState() {
   // Determine the new browser's active state and change if necessary.
@@ -129,10 +128,6 @@ void BrowserShortcutLauncherItemController::SetShelfIDForBrowserWindowContents(
           launcher_controller()->GetShelfIDForWebContents(web_contents));
 }
 
-void BrowserShortcutLauncherItemController::Launch(ash::LaunchSource source,
-                                                   int event_flags) {
-}
-
 ash::ShelfItemDelegate::PerformedAction
 BrowserShortcutLauncherItemController::Activate(ash::LaunchSource source) {
   Browser* last_browser =