Adding a minimize function for clicks on launcher items if only a single item (already active) is a…

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 "ash/wm/window_util.h"
 #include "chrome/browser/favicon/favicon_tab_helper.h"
 #include "chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item.h"
 #include "chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item_tab.h"
@@ skipping 70 matching lines @@
 void AppShortcutLauncherItemController::Activate() {
   content::WebContents* content = GetLRUApplication();
   if (!content) {
     Launch(ui::EF_NONE);
     return;
   }
   Browser* browser = chrome::FindBrowserWithWebContents(content);
   TabStripModel* tab_strip = browser->tab_strip_model();
   int index = tab_strip->GetIndexOfWebContents(content);
   DCHECK_NE(TabStripModel::kNoTab, index);
-  tab_strip->ActivateTabAt(index, false);
-  browser->window()->Show();
-  ash::wm::ActivateWindow(browser->window()->GetNativeWindow());
+
+  int old_index = tab_strip->active_index();
+  if (index != old_index)
+    tab_strip->ActivateTabAt(index, false);
+  app_controller_->ActivateWindowOrMinimizeIfActive(
+      browser->window(),
+      index == old_index && GetRunningApplications().size() == 1);
 }
 
 void AppShortcutLauncherItemController::Close() {
   // Close all running 'programs' of this type.
   std::vector<content::WebContents*> content =
       app_controller_->GetV1ApplicationsFromAppId(app_id());
   for (size_t i = 0; i < content.size(); i++) {
     Browser* browser = chrome::FindBrowserWithWebContents(content[i]);
     if (!browser)
       continue;
@@ skipping 117 matching lines @@
   // - The refocus pattern is matched (needed for apps like drive).
   // - The extension's origin + extent gets matched.
   // - The launcher controller knows that the tab got created for this app.
   return ((!refocus_pattern.match_all_urls() &&
            refocus_pattern.MatchesURL(tab_url)) ||
           (extension->OverlapsWithOrigin(tab_url) &&
            extension->web_extent().MatchesURL(tab_url)) ||
           launcher_controller()->GetPerAppInterface()->
              IsWebContentHandledByApplication(web_contents, app_id()));
 }