Introduce lock screen app context to extension features

extensions/browser/extensions_browser_client.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef EXTENSIONS_BROWSER_EXTENSIONS_BROWSER_CLIENT_H_
 #define EXTENSIONS_BROWSER_EXTENSIONS_BROWSER_CLIENT_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 245 matching lines @@
 
   // Returns true if activity logging is enabled for the given |context|.
   virtual bool IsActivityLoggingEnabled(content::BrowserContext* context);
 
   virtual ExtensionNavigationUIData* GetExtensionNavigationUIData(
       net::URLRequest* request);
 
   // Returns a delegate that provides kiosk mode functionality.
   virtual KioskDelegate* GetKioskDelegate() = 0;
 
+  // Whether the browser context is associated with Chrome OS lock screen.
+  virtual bool IsLockScreenContext(content::BrowserContext* context) = 0;
+
   // Returns the single instance of |this|.
   static ExtensionsBrowserClient* Get();
 
   // Initialize the single instance.
   static void Set(ExtensionsBrowserClient* client);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_EXTENSIONS_BROWSER_CLIENT_H_