Revert of Draggable peeking/fullscreen launcher with transparent background.

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 26 matching lines @@
 #include "ui/views/controls/textfield/textfield.h"
 #include "ui/views/layout/box_layout.h"
 #include "ui/views/layout/fill_layout.h"
 #include "ui/views/widget/widget.h"
 
 namespace app_list {
 
 ////////////////////////////////////////////////////////////////////////////////
 // AppListMainView:
 
-AppListMainView::AppListMainView(AppListViewDelegate* delegate,
-                                 AppListView* app_list_view)
+AppListMainView::AppListMainView(AppListViewDelegate* delegate)
     : delegate_(delegate),
       model_(delegate->GetModel()),
       search_box_view_(nullptr),
-      contents_view_(nullptr),
-      app_list_view_(app_list_view) {
+      contents_view_(nullptr) {
   SetLayoutManager(
       features::IsAnswerCardEnabled()
           ? static_cast<views::LayoutManager*>(new views::FillLayout)
           : static_cast<views::LayoutManager*>(new views::BoxLayout(
                 views::BoxLayout::kVertical, gfx::Insets(), 0)));
   model_->AddObserver(this);
 }
 
 AppListMainView::~AppListMainView() {
   model_->RemoveObserver(this);
 }
 
 void AppListMainView::Init(gfx::NativeView parent,
                            int initial_apps_page,
                            SearchBoxView* search_box_view) {
   search_box_view_ = search_box_view;
   AddContentsViews();
 
   // Switch the apps grid view to the specified page.
   app_list::PaginationModel* pagination_model = GetAppsPaginationModel();
   if (pagination_model->is_valid_page(initial_apps_page))
     pagination_model->SelectPage(initial_apps_page, false);
 
   OnSearchEngineIsGoogleChanged(model_->search_engine_is_google());
 }
 
 void AppListMainView::AddContentsViews() {
   DCHECK(search_box_view_);
-  contents_view_ = new ContentsView(this, app_list_view_);
+
+  contents_view_ = new ContentsView(this);
   contents_view_->Init(model_);
   AddChildView(contents_view_);
 
   search_box_view_->set_contents_view(contents_view_);
 
   contents_view_->SetPaintToLayer();
   contents_view_->layer()->SetFillsBoundsOpaquely(false);
   contents_view_->layer()->SetMasksToBounds(true);
 
   // Clear the old query and start search.
@@ skipping 122 matching lines @@
     contents_view_->search_results_page_view()->SetSelection(select);
 }
 
 void AppListMainView::OnResultInstalled(SearchResult* result) {
   // Clears the search to show the apps grid. The last installed app
   // should be highlighted and made visible already.
   search_box_view_->ClearSearch();
 }
 
 }  // namespace app_list