Revert of Add ARC++ specific fields to launch data for specific apps.

extensions/shell/browser/shell_extension_system.cc

Index: extensions/shell/browser/shell_extension_system.cc
diff --git a/extensions/shell/browser/shell_extension_system.cc b/extensions/shell/browser/shell_extension_system.cc
index 5656032a8de25121431ad714e06667d9a05ee988..13b2646881ad25daaa54485f497035413e99c762 100644
--- a/extensions/shell/browser/shell_extension_system.cc
+++ b/extensions/shell/browser/shell_extension_system.cc
@@ -96,8 +96,9 @@
   const Extension* extension = ExtensionRegistry::Get(browser_context_)
                                    ->enabled_extensions()
                                    .GetByID(extension_id);
-  AppRuntimeEventRouter::DispatchOnLaunchedEvent(browser_context_, extension,
-                                                 SOURCE_UNTRACKED, nullptr);
+  AppRuntimeEventRouter::DispatchOnLaunchedEvent(
+      browser_context_, extension, SOURCE_UNTRACKED,
+      std::unique_ptr<api::app_runtime::ActionData>());
 }
 
 void ShellExtensionSystem::Shutdown() {