Draggable peeking/fullscreen launcher with transparent background.

ui/app_list/views/contents_view.cc

Index: ui/app_list/views/contents_view.cc
diff --git a/ui/app_list/views/contents_view.cc b/ui/app_list/views/contents_view.cc
index a310d8d436f443841dbb21307a26053d1fdb965d..144895dcb3f770375b36505e4866dbc9ab56c7ec 100644
--- a/ui/app_list/views/contents_view.cc
+++ b/ui/app_list/views/contents_view.cc
@@ -61,7 +61,8 @@ class SearchAnswerContainerView : public views::View {
 
 }  // namespace
 
-ContentsView::ContentsView(AppListMainView* app_list_main_view)
+ContentsView::ContentsView(AppListMainView* app_list_main_view,
+                           AppListView* app_list_view)
     : model_(nullptr),
       apps_container_view_(nullptr),
       search_results_page_view_(nullptr),
@@ -70,6 +71,7 @@ ContentsView::ContentsView(AppListMainView* app_list_main_view)
       search_answer_container_view_(nullptr),
       app_list_main_view_(app_list_main_view),
       page_before_search_(0) {
+  app_list_view_ = app_list_view;
   pagination_model_.SetTransitionDurations(kPageTransitionDurationInMs,
                                            kOverscrollPageTransitionDurationMs);
   pagination_model_.AddObserver(this);
@@ -99,7 +101,8 @@ void ContentsView::Init(AppListModel* model) {
   }
 
   // Start page.
-  start_page_view_ = new StartPageView(app_list_main_view_, view_delegate);
+  start_page_view_ =
+      new StartPageView(app_list_main_view_, view_delegate, app_list_view_);
   AddLauncherPage(start_page_view_, AppListModel::STATE_START);
 
   // Search results UI.