Notify launcher page with onTransitionChanged event

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/bind.h"
 #include "base/callback.h"
@@ skipping 94 matching lines @@
 }
 
 void AppListMainView::AddContentsViews() {
   DCHECK(search_box_view_);
 
   contents_view_ = new ContentsView(this);
   if (app_list::switches::IsExperimentalAppListEnabled()) {
     contents_switcher_view_ = new ContentsSwitcherView(contents_view_);
     contents_view_->SetContentsSwitcherView(contents_switcher_view_);
   }
-  contents_view_->Init(model_, delegate_);
+  contents_view_->Init(model_);
   AddChildView(contents_view_);
   if (contents_switcher_view_)
     AddChildView(contents_switcher_view_);
 
   search_box_view_->set_contents_view(contents_view_);
   UpdateSearchBoxVisibility();
 
   contents_view_->SetPaintToLayer(true);
   contents_view_->SetFillsBoundsOpaquely(false);
   contents_view_->layer()->SetMasksToBounds(true);
@@ skipping 176 matching lines @@
   // Resubmit the query via a posted task so that all observers for the
   // uninstall notification are notified.
   base::MessageLoop::current()->PostTask(
       FROM_HERE,
       base::Bind(&AppListMainView::QueryChanged,
                  weak_ptr_factory_.GetWeakPtr(),
                  search_box_view_));
 }
 
 }  // namespace app_list