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 4052ea60160b06a1417c6168ef4bd0be200bba03..2fb382dc2846c52d9c3eeb208110bdb5a07f97f9 100644
--- a/ui/app_list/test/app_list_test_view_delegate.cc
+++ b/ui/app_list/test/app_list_test_view_delegate.cc
@@ -54,6 +54,7 @@ AppListTestViewDelegate::AppListTestViewDelegate()
     : dismiss_count_(0),
       toggle_speech_recognition_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) {
@@ -78,6 +79,11 @@ 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();
 }