diff -r 000000000000 -r 4f2f89ce4247 WebCore/bindings/v8/ScriptCachedFrameData.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/bindings/v8/ScriptCachedFrameData.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,74 @@
+/*
+ * Copyright 2010, The Android Open Source Project
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``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 "ScriptCachedFrameData.h"
+
+#include "Frame.h"
+#include "ScriptController.h"
+#include "V8DOMWindow.h"
+
+namespace WebCore {
+
+ScriptCachedFrameData::ScriptCachedFrameData(Frame* frame)
+    : m_domWindow(0)
+{
+    v8::HandleScope handleScope;
+    // The context can only be the context of the main world.
+    ASSERT(V8Proxy::mainWorldContext(frame) == V8Proxy::context(frame));
+    m_context.set(V8Proxy::mainWorldContext(frame));
+    // The context can be 0, e.g. if JS is disabled in the browser.
+    if (m_context.get().IsEmpty())
+        return;
+    m_global.set(m_context.get()->Global());
+    m_domWindow = frame->domWindow();
+}
+
+DOMWindow* ScriptCachedFrameData::domWindow() const
+{
+    return m_domWindow;
+}
+
+void ScriptCachedFrameData::restore(Frame* frame)
+{
+    if (m_context.get().IsEmpty())
+        return;
+
+    v8::HandleScope handleScope;
+    v8::Context::Scope contextScope(m_context.get());
+
+    m_context.get()->ReattachGlobal(m_global.get());
+    V8Proxy* proxy = V8Proxy::retrieve(frame);
+    if (proxy)
+        proxy->windowShell()->setContext(m_context.get());
+}
+
+void ScriptCachedFrameData::clear()
+{
+    m_context.clear();
+    m_global.clear();
+}
+
+} // namespace WebCore