--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/bindings/v8/MainThreadDOMData.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,68 @@
+/*
+ * 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 "MainThreadDOMData.h"
+
+#include "V8IsolatedContext.h"
+
+namespace WebCore {
+
+MainThreadDOMData::MainThreadDOMData()
+    : m_defaultStore(this)
+{
+}
+    
+MainThreadDOMData* MainThreadDOMData::getCurrent()
+{
+    ASSERT(WTF::isMainThread());
+    DEFINE_STATIC_LOCAL(MainThreadDOMData, mainThreadDOMData, ());
+    return &mainThreadDOMData;
+}
+
+DOMDataStore& MainThreadDOMData::getMainThreadStore()
+{
+    // This is broken out as a separate non-virtual method from getStore()
+    // so that it can be inlined by getCurrentMainThreadStore, which is
+    // a hot spot in Dromaeo DOM tests.
+    ASSERT(WTF::isMainThread());
+    V8IsolatedContext* context = V8IsolatedContext::getEntered();
+    if (UNLIKELY(context != 0))
+        return *context->world()->domDataStore();
+    return m_defaultStore;
+}
+
+DOMDataStore& MainThreadDOMData::getCurrentMainThreadStore()
+{
+    return getCurrent()->getMainThreadStore();
+}
+
+
+} // namespace WebCore