Do not register IME app window in launcher

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

 // Copyright 2014 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_window_launcher_controller.h"
 
 #include "ash/shelf/shelf_util.h"
 #include "ash/shell.h"
 #include "ash/wm/window_util.h"
 #include "base/strings/stringprintf.h"
@@ skipping 127 matching lines @@
   }
 
   // Mark the old active window's launcher item as running (if different).
   AppWindowLauncherItemController* old_controller =
       ControllerForWindow(old_active);
   if (old_controller && old_controller != new_controller)
     owner_->SetItemStatus(old_controller->shelf_id(), ash::STATUS_RUNNING);
 }
 
 void AppWindowLauncherController::RegisterApp(AppWindow* app_window) {
+  // Windows created by IME extension should be treated the same way as the
+  // virtual keyboard window, which does not register itself in launcher.
+  if (app_window->is_ime_window())
+    return;
+
   aura::Window* window = app_window->GetNativeWindow();
   // Get the app's shelf identifier and add an entry to the map.
   DCHECK(window_to_app_shelf_id_map_.find(window) ==
          window_to_app_shelf_id_map_.end());
   const std::string app_shelf_id = GetAppShelfId(app_window);
   window_to_app_shelf_id_map_[window] = app_shelf_id;
   window->AddObserver(this);
 
   // Find or create an item controller and launcher item.
   std::string app_id = app_window->extension_id();
@@ skipping 70 matching lines @@
   WindowToAppShelfIdMap::iterator iter1 =
       window_to_app_shelf_id_map_.find(window);
   if (iter1 == window_to_app_shelf_id_map_.end())
     return NULL;
   std::string app_shelf_id = iter1->second;
   AppControllerMap::iterator iter2 = app_controller_map_.find(app_shelf_id);
   if (iter2 == app_controller_map_.end())
     return NULL;
   return iter2->second;
 }