Add a WebKit API that registers a V8 extension to be loaded into content

webkit/api/public/WebKit.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 51 matching lines @@
     // Registers a URL scheme to be treated as a local scheme (i.e., with the
     // same security rules as those applied to "file" URLs).  This means that
     // normal pages cannot link to or access URLs of this scheme.
     WEBKIT_API void registerURLSchemeAsLocal(const WebString&);
 
     // Registers a URL scheme to be treated as a noAccess scheme.  This means
     // that pages loaded with this URL scheme cannot access pages loaded with
     // any other URL scheme.
     WEBKIT_API void registerURLSchemeAsNoAccess(const WebString&);
 
-    // Registers a v8 extension to be available on webpages with a particular
-    // scheme. If the scheme argument is empty, the extension is available on
-    // all pages. Will only affect v8 contexts initialized after this call.
-    // Takes ownership of the v8::Extension object passed.
+    // Registers a v8 extension to be available on webpages. The three forms
+    // offer various restrictions on what types of contexts the extension is
+    // loaded into. If a scheme is provided, only pages whose URL has the given
+    // scheme will match. If extensionGroup is provided, the extension will only
+    // be loaded into scripts run via WebFrame::ExecuteInNewWorld with the
+    // matching group.
+    // Will only affect v8 contexts initialized after this call. Takes ownership
+    // of the v8::Extension object passed.
     WEBKIT_API void registerExtension(v8::Extension*);
     WEBKIT_API void registerExtension(v8::Extension*,
                                       const WebString& schemeRestriction);
+    WEBKIT_API void registerExtension(v8::Extension*, int extensionGroup);
 
     // Process any pending JavaScript console messages.
     WEBKIT_API void flushConsoleMessages();
 
     // Enables HTML5 media support.
     WEBKIT_API void enableMediaPlayer();
 
     // Purge the plugin list cache.
     WEBKIT_API void resetPluginCache();
 
     // Enables HTML5 database support.
     WEBKIT_API void enableDatabases();
     WEBKIT_API bool databasesEnabled();
 
 } // namespace WebKit
 
 #endif