[win] Add a progress bar in the app launcher for app installs.

ui/app_list/views/app_list_main_view.cc

 // 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.
 
 #include "ui/app_list/views/app_list_main_view.h"
 
 #include <algorithm>
 
 #include "base/string_util.h"
 #include "ui/app_list/app_list_constants.h"
@@ skipping 42 matching lines @@
   }
 
  private:
   // AppListItemModelObserver overrides:
   virtual void ItemIconChanged() OVERRIDE {
     owner_->OnItemIconLoaded(this);
     // Note that IconLoader is released here.
   }
   virtual void ItemTitleChanged() OVERRIDE {}
   virtual void ItemHighlightedChanged() OVERRIDE {}
+  virtual void ItemIsInstallingChanged() OVERRIDE {};
+  virtual void ItemPercentDownloadedChanged() OVERRIDE {};
 
   AppListMainView* owner_;
   AppListItemModel* item_;
 
   DISALLOW_COPY_AND_ASSIGN(IconLoader);
 };
 
 ////////////////////////////////////////////////////////////////////////////////
 // AppListMainView:
 
@@ skipping 124 matching lines @@
 }
 
 void AppListMainView::InvokeResultAction(const SearchResult& result,
                                          int action_index,
                                          int event_flags) {
   if (delegate_)
     delegate_->InvokeSearchResultAction(result, action_index, event_flags);
 }
 
 }  // namespace app_list