Make "source" a required argument of AppLaunchParams and fill in the argument in all call points.

chrome/browser/chromeos/policy/device_local_account_browsertest.cc

Index: chrome/browser/chromeos/policy/device_local_account_browsertest.cc
diff --git a/chrome/browser/chromeos/policy/device_local_account_browsertest.cc b/chrome/browser/chromeos/policy/device_local_account_browsertest.cc
index c3d2d6fb85518ac6a2faa4a843b40c67a66a72dd..d38a9d3b3dc9bc1ffc13bb12ae13b738246b86db 100644
--- a/chrome/browser/chromeos/policy/device_local_account_browsertest.cc
+++ b/chrome/browser/chromeos/policy/device_local_account_browsertest.cc
@@ -74,6 +74,7 @@
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_list_observer.h"
 #include "chrome/browser/ui/browser_window.h"
+#include "chrome/browser/ui/extensions/app_launch_params.h"
 #include "chrome/browser/ui/extensions/application_launch.h"
 #include "chrome/browser/ui/host_desktop.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
@@ -119,6 +120,7 @@
 #include "extensions/browser/extension_system.h"
 #include "extensions/browser/management_policy.h"
 #include "extensions/browser/notification_types.h"
+#include "extensions/common/constants.h"
 #include "extensions/common/extension.h"
 #include "net/base/url_util.h"
 #include "net/http/http_status_code.h"
@@ -1325,8 +1327,9 @@ IN_PROC_BROWSER_TEST_F(DeviceLocalAccountTest, LastWindowClosedLogoutReminder) {
 
   // Start the platform app, causing it to open a window.
   run_loop_.reset(new base::RunLoop);
-  OpenApplication(AppLaunchParams(
-      profile, app, extensions::LAUNCH_CONTAINER_NONE, NEW_WINDOW));
+  OpenApplication(AppLaunchParams(profile, app,
+                                  extensions::LAUNCH_CONTAINER_NONE, NEW_WINDOW,
+                                  extensions::SOURCE_UNTRACKED));
   run_loop_->Run();
   EXPECT_EQ(1U, app_window_registry->app_windows().size());