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

extensions/browser/api/app_runtime/app_runtime_api.cc

Index: extensions/browser/api/app_runtime/app_runtime_api.cc
diff --git a/extensions/browser/api/app_runtime/app_runtime_api.cc b/extensions/browser/api/app_runtime/app_runtime_api.cc
index 13ac1beb5516add75e1a900db48bae946c8e55a8..dfee0f60b4bfa1c9d4747bc815c19a0b5732cbfc 100644
--- a/extensions/browser/api/app_runtime/app_runtime_api.cc
+++ b/extensions/browser/api/app_runtime/app_runtime_api.cc
@@ -91,6 +91,19 @@ app_runtime::LaunchSource getLaunchSourceEnum(
     case extensions::SOURCE_KEYBOARD:
       return app_runtime::LAUNCH_SOURCE_KEYBOARD;
 
+    case extensions::SOURCE_SETTINGS_PAGE:
+      return app_runtime::LAUNCH_SOURCE_SETTINGS_PAGE;
+    case extensions::SOURCE_MANAGEMENT_API:
+      return app_runtime::LAUNCH_SOURCE_MANAGEMENT_API;
+    case extensions::SOURCE_EPHEMERAL:
+      return app_runtime::LAUNCH_SOURCE_EPHEMERAL;
+    case extensions::SOURCE_BACKGROUND:
+      return app_runtime::LAUNCH_SOURCE_BACKGROUND;
+    case extensions::SOURCE_KIOSK:
+      return app_runtime::LAUNCH_SOURCE_KIOSK;
+    case extensions::SOURCE_CHROME_INTERNAL:
+      return app_runtime::LAUNCH_SOURCE_CHROME_INTERNAL;
+
     default:
       return app_runtime::LAUNCH_SOURCE_NONE;
   }