Fix crash in the experimental app list StartPageView.

ui/app_list/test/app_list_test_view_delegate.cc

Index: ui/app_list/test/app_list_test_view_delegate.cc
diff --git a/ui/app_list/test/app_list_test_view_delegate.cc b/ui/app_list/test/app_list_test_view_delegate.cc
index ab712bfadbd1ea2224b1f6bd8701ad77da792a66..2025242a9596f88236e174d6d47d61f4d138f13f 100644
--- a/ui/app_list/test/app_list_test_view_delegate.cc
+++ b/ui/app_list/test/app_list_test_view_delegate.cc
@@ -53,6 +53,7 @@ class TestSigninDelegate : public SigninDelegate {
 AppListTestViewDelegate::AppListTestViewDelegate()
     : dismiss_count_(0),
       open_search_result_count_(0),
+      next_profile_app_count_(0),
       test_signin_delegate_(new TestSigninDelegate),
       model_(new AppListTestModel),
       speech_ui_(SPEECH_RECOGNITION_OFF) {
@@ -71,6 +72,11 @@ bool AppListTestViewDelegate::ForceNativeDesktop() const {
   return false;
 }
 
+void AppListTestViewDelegate::SetProfileByPath(
+    const base::FilePath& profile_path) {
+  ReplaceTestModel(next_profile_app_count_);
+}
+
 AppListModel* AppListTestViewDelegate::GetModel() {
   return model_.get();
 }