Revert of Draggable peeking/fullscreen launcher with transparent background.

ui/app_list/views/contents_view.cc

 // Copyright (c) 2012 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/contents_view.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 11 matching lines @@
 #include "ui/app_list/views/search_result_list_view.h"
 #include "ui/app_list/views/search_result_page_view.h"
 #include "ui/app_list/views/search_result_tile_item_list_view.h"
 #include "ui/app_list/views/start_page_view.h"
 #include "ui/events/event.h"
 #include "ui/views/view_model.h"
 #include "ui/views/widget/widget.h"
 
 namespace app_list {
 
-ContentsView::ContentsView(AppListMainView* app_list_main_view,
-                           AppListView* app_list_view)
+ContentsView::ContentsView(AppListMainView* app_list_main_view)
     : model_(nullptr),
       apps_container_view_(nullptr),
       search_results_page_view_(nullptr),
       start_page_view_(nullptr),
       custom_page_view_(nullptr),
       app_list_main_view_(app_list_main_view),
-      app_list_view_(app_list_view),
       page_before_search_(0) {
   pagination_model_.SetTransitionDurations(kPageTransitionDurationInMs,
                                            kOverscrollPageTransitionDurationMs);
   pagination_model_.AddObserver(this);
 }
 
 ContentsView::~ContentsView() {
   pagination_model_.RemoveObserver(this);
 }
 
 void ContentsView::Init(AppListModel* model) {
   DCHECK(model);
   model_ = model;
 
   AppListViewDelegate* view_delegate = app_list_main_view_->view_delegate();
 
   std::vector<views::View*> custom_page_views =
       view_delegate->CreateCustomPageWebViews(GetLocalBounds().size());
   // Only add the first custom page view as STATE_CUSTOM_LAUNCHER_PAGE. Ignore
   // any subsequent custom pages.
   if (!custom_page_views.empty()) {
     custom_page_view_ = new CustomLauncherPageView(custom_page_views[0]);
 
     AddLauncherPage(custom_page_view_,
                     AppListModel::STATE_CUSTOM_LAUNCHER_PAGE);
   }
 
   // Start page.
-  start_page_view_ =
-      new StartPageView(app_list_main_view_, view_delegate, app_list_view_);
+  start_page_view_ = new StartPageView(app_list_main_view_, view_delegate);
   AddLauncherPage(start_page_view_, AppListModel::STATE_START);
 
   // Search results UI.
   search_results_page_view_ = new SearchResultPageView();
 
   // Search result containers.
   AppListModel::SearchResults* results = view_delegate->GetModel()->results();
 
   if (features::IsAnswerCardEnabled()) {
     search_results_page_view_->AddSearchResultContainerView(
@@ skipping 402 matching lines @@
 }
 
 void ContentsView::TransitionStarted() {
 }
 
 void ContentsView::TransitionChanged() {
   UpdatePageBounds();
 }
 
 }  // namespace app_list