Add Hide and Show to the app list SearchBoxView.

ui/app_list/views/app_list_main_view_unittest.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 "testing/gtest/include/gtest/gtest.h"
 #include "ui/app_list/pagination_model.h"
 #include "ui/app_list/test/app_list_test_model.h"
 #include "ui/app_list/test/app_list_test_view_delegate.h"
@@ skipping 18 matching lines @@
         main_view_(NULL) {}
 
   virtual ~AppListMainViewTest() {}
 
   // testing::Test overrides:
   virtual void SetUp() OVERRIDE {
     views::ViewsTestBase::SetUp();
     delegate_.reset(new AppListTestViewDelegate);
     delegate_->GetTestModel()->PopulateApps(kInitialItems);
 
-    main_view_ =
-        new AppListMainView(delegate_.get(), &pagination_model_, GetContext());
+    main_view_ = new AppListMainView(NULL,
+                                     delegate_.get(),
+                                     &pagination_model_,
+                                     GetContext());
     main_view_->SetPaintToLayer(true);
 
     widget_ = new views::Widget;
     views::Widget::InitParams params =
         CreateParams(views::Widget::InitParams::TYPE_POPUP);
     params.bounds.set_size(main_view_->GetPreferredSize());
     widget_->Init(params);
 
     widget_->SetContentsView(main_view_);
   }
@@ skipping 30 matching lines @@
   scoped_ptr<AppListModel> old_model(delegate_->ReleaseTestModel());
 
   const int kReplacementItems = 5;
   delegate_->ReplaceTestModel(kReplacementItems);
   main_view_->ModelChanged();
   EXPECT_EQ(kReplacementItems, ViewModel()->view_size());
 }
 
 }  // namespace test
 }  // namespace app_list