Draggable peeking/fullscreen launcher with transparent background.

ui/app_list/views/app_list_main_view.cc

Index: ui/app_list/views/app_list_main_view.cc
diff --git a/ui/app_list/views/app_list_main_view.cc b/ui/app_list/views/app_list_main_view.cc
index 13f77b987917e78440028f37be035eed83e4e976..c0c5fb86b948183b30f376a7f1e6e4800bd46628 100644
--- a/ui/app_list/views/app_list_main_view.cc
+++ b/ui/app_list/views/app_list_main_view.cc
@@ -62,8 +62,10 @@ AppListMainView::~AppListMainView() {
 
 void AppListMainView::Init(gfx::NativeView parent,
                            int initial_apps_page,
-                           SearchBoxView* search_box_view) {
+                           SearchBoxView* search_box_view,
+                           AppListView* app_list_view) {
   search_box_view_ = search_box_view;
+  app_list_view_ = app_list_view;
   AddContentsViews();
 
   // Switch the apps grid view to the specified page.
@@ -76,8 +78,7 @@ void AppListMainView::Init(gfx::NativeView parent,
 
 void AppListMainView::AddContentsViews() {
   DCHECK(search_box_view_);
-
-  contents_view_ = new ContentsView(this);
+  contents_view_ = new ContentsView(this, app_list_view_);
   contents_view_->Init(model_);
   AddChildView(contents_view_);