Introduce lock screen app context to extension features

extensions/shell/browser/shell_extensions_browser_client.cc

Index: extensions/shell/browser/shell_extensions_browser_client.cc
diff --git a/extensions/shell/browser/shell_extensions_browser_client.cc b/extensions/shell/browser/shell_extensions_browser_client.cc
index 8030a14eb065cb57cbb48de15fe8f5c286e9fddd..1018c21525ce94121a54df41e791940dd3bd20fa 100644
--- a/extensions/shell/browser/shell_extensions_browser_client.cc
+++ b/extensions/shell/browser/shell_extensions_browser_client.cc
@@ -274,4 +274,9 @@ KioskDelegate* ShellExtensionsBrowserClient::GetKioskDelegate() {
   return kiosk_delegate_.get();
 }
 
+bool ShellExtensionsBrowserClient::IsLockScreenContext(
+    content::BrowserContext* context) {
+  return false;
+}
+
 }  // namespace extensions