Adds an integration test for uninstalling app list search results.

ash/shell.cc

Index: ash/shell.cc
diff --git a/ash/shell.cc b/ash/shell.cc
index c32371fc00d46d4c007dac8fdb99e3959833a4e5..0f0e80cbcb179164f1f011e9165962361b9e110d 100644
--- a/ash/shell.cc
+++ b/ash/shell.cc
@@ -685,6 +685,12 @@ aura::Window* Shell::GetAppListWindow() {
   return app_list_controller_.get() ? app_list_controller_->GetWindow() : NULL;
 }
 
+app_list::AppListView* Shell::GetAppListViewForTesting() {
+  return app_list_controller_.get() ?
+      app_list_controller_->GetViewForTesting() :
+      NULL;
+}
+
 bool Shell::IsSystemModalWindowOpen() const {
   if (simulate_modal_window_open_for_testing_)
     return true;