app_list: Show apps grid after installing from cws result.

ui/app_list/cocoa/apps_search_results_model_bridge.mm

 // Copyright 2013 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.
 
 #import "ui/app_list/cocoa/apps_search_results_model_bridge.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/strings/sys_string_conversions.h"
 #include "ui/app_list/search_result.h"
@@ skipping 25 matching lines @@
     return [context_menu_controller_ menu];
   }
 
   // SearchResultObserver overrides:
   virtual void OnIconChanged() OVERRIDE {
     bridge_->ReloadDataForItems(row_in_view_, 1);
   }
   virtual void OnActionsChanged() OVERRIDE {}
   virtual void OnIsInstallingChanged() OVERRIDE {}
   virtual void OnPercentDownloadedChanged() OVERRIDE {}
+  virtual void OnItemInstalled() OVERRIDE {}
 
  private:
   AppsSearchResultsModelBridge* bridge_;  // Weak. Owns us.
   SearchResult* result_;  // Weak. Owned by AppListModel::SearchResults.
   size_t row_in_view_;
   base::scoped_nsobject<MenuController> context_menu_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(ItemObserver);
 };
 
@@ skipping 57 matching lines @@
 }
 
 void AppsSearchResultsModelBridge::ListItemsChanged(
     size_t start, size_t count) {
   item_observers_.clear();
   ReloadDataForItems(start, count);
   UpdateItemObservers();
 }
 
 }  // namespace app_list