Add profile selector menu to app list.

ui/app_list/views/app_list_view.cc

Index: ui/app_list/views/app_list_view.cc
diff --git a/ui/app_list/views/app_list_view.cc b/ui/app_list/views/app_list_view.cc
index 863e25e55df8ed22c06c2754746e4cb85b65f187..8977186e7310ba0faef8ca85cdf50be46b91bb7e 100644
--- a/ui/app_list/views/app_list_view.cc
+++ b/ui/app_list/views/app_list_view.cc
@@ -50,15 +50,16 @@ AppListView::AppListView(AppListViewDelegate* delegate)
       app_list_main_view_(NULL),
       signin_view_(NULL) {
   if (delegate_)
-    delegate_->SetModel(model_.get());
+    delegate_->InitModel(model_.get());
   if (GetSigninDelegate())
     GetSigninDelegate()->AddObserver(this);
+  model_->AddObserver(this);
 }
 
 AppListView::~AppListView() {
   if (GetSigninDelegate())
     GetSigninDelegate()->RemoveObserver(this);
-
+  model_->RemoveObserver(this);
   // Models are going away, ensure their references are cleared.
   RemoveAllChildViews(true);
 }
@@ -174,6 +175,7 @@ void AppListView::Prerender() {
 }
 
 void AppListView::OnSigninStatusChanged() {
+  delegate_->UpdateModelWithCurrentProfiles();

[koz (OOO until 15th September), 2013/08/02 01:51:16]

This would be better if the delegate listened to the signin delegate itself as
it would then have 100% responsibility for knowing when changes to the profile
occur.

If you do that then AppListView can just listen to the model and update itself
when the profile changes and this function just becomes
OnAppListodelProfilesChanged() below.

[calamity, 2013/08/02 09:59:54]

Done.

   const bool needs_signin =
       GetSigninDelegate() && GetSigninDelegate()->NeedSignin();
 
@@ -259,6 +261,15 @@ void AppListView::OnSigninSuccess() {
   OnSigninStatusChanged();
 }
 
+void AppListView::OnAppListModelProfilesChanged() {
+  const bool needs_signin =
+      GetSigninDelegate() && GetSigninDelegate()->NeedSignin();
+
+  signin_view_->SetVisible(needs_signin);
+  app_list_main_view_->SetVisible(!needs_signin);
+  app_list_main_view_->search_box_view()->InvalidateMenu();
+}
+
 SigninDelegate* AppListView::GetSigninDelegate() {
   return delegate_ ? delegate_->GetSigninDelegate() : NULL;
 }