Create --disable-extensions-except switch

chrome/browser/extensions/chrome_extensions_browser_client.cc

Index: chrome/browser/extensions/chrome_extensions_browser_client.cc
diff --git a/chrome/browser/extensions/chrome_extensions_browser_client.cc b/chrome/browser/extensions/chrome_extensions_browser_client.cc
index 47e58818826dca7e42d3d53e6b4edb0bafc330f0..b053fc6fd82100ccbfd193585879101fe4d6302d 100644
--- a/chrome/browser/extensions/chrome_extensions_browser_client.cc
+++ b/chrome/browser/extensions/chrome_extensions_browser_client.cc
@@ -86,8 +86,8 @@ bool ChromeExtensionsBrowserClient::AreExtensionsDisabled(
     const base::CommandLine& command_line,
     content::BrowserContext* context) {
   Profile* profile = static_cast<Profile*>(context);
-  return command_line.HasSwitch(switches::kDisableExtensions) ||
-      profile->GetPrefs()->GetBoolean(prefs::kDisableExtensions);
+  return switches::ExtensionsDisabled(command_line) ||
+         profile->GetPrefs()->GetBoolean(prefs::kDisableExtensions);
 }
 
 bool ChromeExtensionsBrowserClient::IsValidContext(