Remove ShelfItemDelegate::IsDraggable; check for app list button.

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

 // 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/browser/ui/ash/launcher/app_shortcut_launcher_item_controller.h"
 
 #include <stddef.h>
 
 #include "ash/wm/window_util.h"
 #include "chrome/browser/chromeos/arc/arc_support_host.h"
@@ skipping 202 matching lines @@
 base::string16 AppShortcutLauncherItemController::GetTitle() {
   return LauncherControllerHelper::GetAppTitle(launcher_controller()->profile(),
                                                app_id());
 }
 
 ash::ShelfMenuModel* AppShortcutLauncherItemController::CreateApplicationMenu(
     int event_flags) {
   return new LauncherApplicationMenuItemModel(GetApplicationList(event_flags));
 }
 
-bool AppShortcutLauncherItemController::IsDraggable() {
-  return true;
-}
-
 bool AppShortcutLauncherItemController::CanPin() const {
   return GetPinnableForAppID(app_id(), launcher_controller()->profile()) ==
          AppListControllerDelegate::PIN_EDITABLE;
 }
 
 content::WebContents* AppShortcutLauncherItemController::GetLRUApplication() {
   URLPattern refocus_pattern(URLPattern::SCHEME_ALL);
   refocus_pattern.SetMatchAllURLs(true);
 
   if (!refocus_url_.is_empty()) {
@@ skipping 131 matching lines @@
 
 bool AppShortcutLauncherItemController::AllowNextLaunchAttempt() {
   if (last_launch_attempt_.is_null() ||
       last_launch_attempt_ + base::TimeDelta::FromMilliseconds(
           kClickSuppressionInMS) < base::Time::Now()) {
     last_launch_attempt_ = base::Time::Now();
     return true;
   }
   return false;
 }