arc: Support window recreation.

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

 // Copyright 2016 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/arc_app_window_launcher_item_controller.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/app_list/arc/arc_app_list_prefs.h"
+#include "chrome/browser/ui/app_list/arc/arc_app_utils.h"
 #include "chrome/browser/ui/ash/launcher/arc_app_window_launcher_controller.h"
 #include "chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item_v2app.h"
 #include "chrome/browser/ui/ash/launcher/chrome_launcher_controller.h"
 #include "chrome/browser/ui/ash/launcher/launcher_application_menu_item_model.h"
 #include "ui/aura/window.h"
 #include "ui/base/base_window.h"
 
 ArcAppWindowLauncherItemController::ArcAppWindowLauncherItemController(
     const std::string& arc_app_id,
     ChromeLauncherController* controller)
     : AppWindowLauncherItemController(TYPE_APP,
                                       arc_app_id,
                                       arc_app_id,
                                       controller) {}
 
 ArcAppWindowLauncherItemController::~ArcAppWindowLauncherItemController() {}
 
+void ArcAppWindowLauncherItemController::AddTaskId(int task_id) {
+  task_ids_.insert(task_id);
+}
+
+void ArcAppWindowLauncherItemController::RemoveTaskId(int task_id) {
+  task_ids_.erase(task_id);
+}
+
+ash::ShelfItemDelegate::PerformedAction
+ArcAppWindowLauncherItemController::ItemSelected(const ui::Event& event) {
+  if (window_count()) {
+    return AppWindowLauncherItemController::ItemSelected(event);
+  } else {
+    if (task_ids_.empty()) {
+      NOTREACHED();
+      return kNoAction;
+    }
+    arc::SetTaskActive(*task_ids_.begin());
+    return kNewWindowCreated;
+  }
+}
+
 base::string16 ArcAppWindowLauncherItemController::GetTitle() {
   ArcAppListPrefs* arc_prefs =
       ArcAppListPrefs::Get(launcher_controller()->GetProfile());
   DCHECK(arc_prefs);
   std::unique_ptr<ArcAppListPrefs::AppInfo> app_info = arc_prefs->GetApp(
       ArcAppWindowLauncherController::GetArcAppIdFromShelfAppId(app_id()));
   if (!app_info) {
     NOTREACHED();
     return base::string16();
   }
@@ skipping 15 matching lines @@
     size_t i = std::distance(windows().begin(), it);
     gfx::Image image;
     aura::Window* window = (*it)->GetNativeWindow();
     items.push_back(new ChromeLauncherAppMenuItemV2App(
         ((window && !window->title().empty()) ? window->title() : GetTitle()),
         &image, app_id(), launcher_controller(), i,
         i == 0 /* has_leading_separator */));
   }
   return items;
 }