Loading the Launcher with a Locked Profile launched UserManager.

chrome/browser/ui/app_list/app_list_service_interactive_uitest.cc

Index: chrome/browser/ui/app_list/app_list_service_interactive_uitest.cc
diff --git a/chrome/browser/ui/app_list/app_list_service_interactive_uitest.cc b/chrome/browser/ui/app_list/app_list_service_interactive_uitest.cc
index f8690d71d2cfab2defa6a590b125ddb1b68890ef..8a3a1dae27f42d05f83960983e69a7d5fa87bc54 100644
--- a/chrome/browser/ui/app_list/app_list_service_interactive_uitest.cc
+++ b/chrome/browser/ui/app_list/app_list_service_interactive_uitest.cc
@@ -23,6 +23,8 @@
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/in_process_browser_test.h"
+#include "chrome/test/base/testing_browser_process.h"
+#include "chrome/test/base/testing_profile_manager.h"
 #include "content/public/test/test_utils.h"
 #include "ui/app_list/app_list_model.h"
 #include "ui/app_list/search_box_model.h"
@@ -33,14 +35,21 @@
 class AppListServiceInteractiveTest : public InProcessBrowserTest {
  public:
   AppListServiceInteractiveTest()
-    : profile2_(NULL) {}
+    : profile2_(NULL),
+      profile_manager_(TestingBrowserProcess::GetGlobal()) {}
 
   void InitSecondProfile() { profile2_ = test::CreateSecondProfileAsync(); }
 
+  void SetUp() override {
+    ASSERT_TRUE(profile_manager_.SetUp());
+  }
+
  protected:
   Profile* profile2_;
 
  private:
+  TestingProfileManager profile_manager_;
+
   DISALLOW_COPY_AND_ASSIGN(AppListServiceInteractiveTest);
 };