diff -r 000000000000 -r 4f2f89ce4247 WebCore/bindings/js/ScriptCachedFrameData.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/bindings/js/ScriptCachedFrameData.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2008, Google Inc. All rights reserved.
+ * Copyright (C) 2008 Apple 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 "ScriptCachedFrameData.h"
+
+#include "Frame.h"
+#include "GCController.h"
+#include "Page.h"
+#include "PageGroup.h"
+#include <runtime/JSLock.h>
+#include "ScriptController.h"
+
+using namespace JSC;
+
+namespace WebCore {
+
+ScriptCachedFrameData::ScriptCachedFrameData(Frame* frame)
+    : m_domWindow(0)
+{
+    JSLock lock(SilenceAssertionsOnly);
+
+    ScriptController* scriptController = frame->script();
+    ScriptController::ShellMap& windowShells = scriptController->m_windowShells;
+
+    ScriptController::ShellMap::iterator windowShellsEnd = windowShells.end();
+    for (ScriptController::ShellMap::iterator iter = windowShells.begin(); iter != windowShellsEnd; ++iter) {
+        JSDOMWindow* window = iter->second->window();
+        m_windows.add(iter->first.get(), window);
+        m_domWindow = window->impl();
+    }
+
+    scriptController->attachDebugger(0);
+}
+
+DOMWindow* ScriptCachedFrameData::domWindow() const
+{
+    return m_domWindow;
+}
+
+ScriptCachedFrameData::~ScriptCachedFrameData()
+{
+    clear();
+}
+
+void ScriptCachedFrameData::restore(Frame* frame)
+{
+    JSLock lock(SilenceAssertionsOnly);
+
+    ScriptController* scriptController = frame->script();
+    ScriptController::ShellMap& windowShells = scriptController->m_windowShells;
+
+    ScriptController::ShellMap::iterator windowShellsEnd = windowShells.end();
+    for (ScriptController::ShellMap::iterator iter = windowShells.begin(); iter != windowShellsEnd; ++iter) {
+        DOMWrapperWorld* world = iter->first.get();
+        JSDOMWindowShell* windowShell = iter->second.get();
+
+        if (JSDOMWindow* window = m_windows.get(world))
+            windowShell->setWindow(window);
+        else {
+            windowShell->setWindow(frame->domWindow());
+
+            if (Page* page = frame->page()) {
+                scriptController->attachDebugger(windowShell, page->debugger());
+                windowShell->window()->setProfileGroup(page->group().identifier());
+            }
+        }
+    }
+}
+
+void ScriptCachedFrameData::clear()
+{
+    if (m_windows.isEmpty())
+        return;
+
+    JSLock lock(SilenceAssertionsOnly);
+    m_windows.clear();
+    gcController().garbageCollectSoon();
+}
+
+} // namespace WebCore