arc: Support pinned apps across Arc-enabled and Arc-disabled platforms.

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 205 matching lines @@
   return LauncherControllerHelper::GetAppTitle(
       launcher_controller()->GetProfile(), app_id());
 }
 
 ash::ShelfMenuModel* AppShortcutLauncherItemController::CreateApplicationMenu(
     int event_flags) {
   return new LauncherApplicationMenuItemModel(GetApplicationList(event_flags));
 }
 
 bool AppShortcutLauncherItemController::IsDraggable() {
-  return CanPin();
+  return true;
 }
 
 bool AppShortcutLauncherItemController::CanPin() const {
   return launcher_controller()->GetPinnable(app_id()) ==
          AppListControllerDelegate::PIN_EDITABLE;
 }
 
 bool AppShortcutLauncherItemController::ShouldShowTooltip() {
   return true;
 }
@@ skipping 137 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;
 }