Introduce lock screen app context to extension features

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 2f8b4c4e40d809386721a454dd77c754bacbf1fd..e95faa1a96078aa42bc07440f65506d38a19c83d 100644
--- a/chrome/browser/extensions/chrome_extensions_browser_client.cc
+++ b/chrome/browser/extensions/chrome_extensions_browser_client.cc
@@ -45,6 +45,7 @@
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "components/net_log/chrome_net_log.h"
+#include "components/session_manager/core/session_manager.h"
 #include "components/update_client/update_client.h"
 #include "components/version_info/version_info.h"
 #include "content/public/browser/render_process_host.h"
@@ -439,4 +440,14 @@ KioskDelegate* ChromeExtensionsBrowserClient::GetKioskDelegate() {
   return kiosk_delegate_.get();
 }
 
+bool ChromeExtensionsBrowserClient::IsLockScreenContext(
+    content::BrowserContext* context) {
+#if defined(OS_CHROMEOS)
+  return chromeos::ProfileHelper::IsSigninProfile(
+             Profile::FromBrowserContext(context)) &&
+         session_manager::SessionManager::Get()->IsSessionStarted();
+#else
+  return false;
+#endif
+}
 }  // namespace extensions