Give platform apps control over launcher right-click context menu.

chrome/browser/ui/ash/launcher/chrome_launcher_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/chrome_launcher_controller.h"
 
 #include <set>
 #include <vector>
 
 #include "ash/launcher/launcher_model.h"
@@ skipping 341 matching lines @@
 ash::LauncherID ChromeLauncherController::GetLauncherIDForAppID(
     const std::string& app_id) {
   for (IDToItemMap::const_iterator i = id_to_item_map_.begin();
        i != id_to_item_map_.end(); ++i) {
     if (i->second.app_id == app_id)
       return i->first;
   }
   return 0;
 }
 
+std::string ChromeLauncherController::GetAppIDForLauncherID(
+    ash::LauncherID id) {
+  DCHECK(id_to_item_map_.find(id) != id_to_item_map_.end());
+  return id_to_item_map_[id].app_id;
+}
+
 void ChromeLauncherController::SetAppImage(const std::string& id,
                                            const gfx::ImageSkia& image) {
   // TODO: need to get this working for shortcuts.
 
   for (IDToItemMap::const_iterator i = id_to_item_map_.begin();
        i != id_to_item_map_.end(); ++i) {
     if (i->second.app_id != id)
       continue;
 
     // Panel items may share the same app_id as the app that created them,
@@ skipping 565 matching lines @@
 }
 
 void ChromeLauncherController::StopLoadingAnimation() {
   DCHECK(observed_sync_service_);
 
   model_->SetStatus(ash::LauncherModel::STATUS_NORMAL);
   loading_timer_.Stop();
   observed_sync_service_->RemoveObserver(this);
   observed_sync_service_ = NULL;
 }