First pass at fixing guest browser cookies issue.

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 2708b38148df7267214c7e9f3d6e5c67b78974bb..292e39595a55eb69b9c88b1d41c16a9dc2d56551 100644
--- a/ui/app_list/views/app_list_main_view.cc
+++ b/ui/app_list/views/app_list_main_view.cc
@@ -115,6 +115,7 @@ AppListMainView::AppListMainView(AppListViewDelegate* delegate)
       custom_page_clickzone_(nullptr),
       weak_ptr_factory_(this) {
   SetLayoutManager(new views::BoxLayout(views::BoxLayout::kVertical, 0, 0, 0));
+  DLOG(ERROR) << "mainview";
   model_->AddObserver(this);
 }
 
@@ -191,6 +192,7 @@ void AppListMainView::Prerender() {
 }
 
 void AppListMainView::ModelChanged() {
+  DLOG(ERROR) << "modelchanged";
   pending_icon_loaders_.clear();
   model_->RemoveObserver(this);
   model_ = delegate_->GetModel();