--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/bindings/js/ScriptState.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,67 @@
+/*
+ * 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
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "ScriptState.h"
+
+#include "Frame.h"
+#include "JSDOMWindowBase.h"
+#include "Node.h"
+#include "Page.h"
+
+namespace WebCore {
+
+ScriptState* mainWorldScriptState(Frame* frame)
+{
+    JSDOMWindowShell* shell = frame->script()->windowShell(mainThreadNormalWorld());
+    return shell->window()->globalExec();
+}
+
+ScriptState* scriptStateFromNode(DOMWrapperWorld* world, Node* node)
+{
+    if (!node)
+        return 0;
+    Document* document = node->document();
+    if (!document)
+        return 0;
+    Frame* frame = document->frame();
+    if (!frame)
+        return 0;
+    if (!frame->script()->canExecuteScripts(NotAboutToExecuteScript))
+        return 0;
+    return frame->script()->globalObject(world)->globalExec();
+}
+
+ScriptState* scriptStateFromPage(DOMWrapperWorld* world, Page* page)
+{
+    return page->mainFrame()->script()->globalObject(world)->globalExec();
+}
+
+}