remove --enable-experimental-extension-apis from packaged app shortcut args

chrome/browser/shell_integration.cc

Index: chrome/browser/shell_integration.cc
diff --git a/chrome/browser/shell_integration.cc b/chrome/browser/shell_integration.cc
index 519ded75981c94d38c084cab4854cab37b4f67cf..11cf69e8e020d44b612b84bbc7fd7fd4a90dc2ab 100644
--- a/chrome/browser/shell_integration.cc
+++ b/chrome/browser/shell_integration.cc
@@ -55,7 +55,6 @@ bool ShellIntegration::IsRunningInAppMode() {
 CommandLine ShellIntegration::CommandLineArgsForLauncher(
     const GURL& url,
     const std::string& extension_app_id,
-    bool is_platform_app,
     const FilePath& profile_path) {
   const CommandLine& cmd_line = *CommandLine::ForCurrentProcess();
   CommandLine new_cmd_line(CommandLine::NO_PROGRAM);
@@ -85,8 +84,6 @@ CommandLine ShellIntegration::CommandLineArgsForLauncher(
   // during launch.
   if (!extension_app_id.empty()) {
     new_cmd_line.AppendSwitchASCII(switches::kAppId, extension_app_id);
-    if (is_platform_app)
-      new_cmd_line.AppendSwitch(switches::kEnableExperimentalExtensionApis);
   } else {
     // Use '--app=url' instead of just 'url' to launch the browser with minimal
     // chrome.