--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/loader/FrameLoaderStateMachine.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2010 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:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer. 
+ * 2.  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. 
+ * 3.  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 APPLE OR ITS 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 "FrameLoaderStateMachine.h"
+
+#include <wtf/Assertions.h>
+
+namespace WebCore {
+
+    
+FrameLoaderStateMachine::FrameLoaderStateMachine() 
+    : m_state(Uninitialized)
+{ 
+}
+    
+bool FrameLoaderStateMachine::committingFirstRealLoad() const 
+{
+    return m_state == DisplayingInitialEmptyDocument;
+}
+
+bool FrameLoaderStateMachine::committedFirstRealDocumentLoad() const 
+{
+    return m_state >= DisplayingInitialEmptyDocumentPostCommit;
+}
+
+bool FrameLoaderStateMachine::creatingInitialEmptyDocument() const 
+{
+    return m_state == CreatingInitialEmptyDocument;
+}
+
+bool FrameLoaderStateMachine::isDisplayingInitialEmptyDocument() const 
+{
+    return m_state == DisplayingInitialEmptyDocument || m_state == DisplayingInitialEmptyDocumentPostCommit;
+}
+
+bool FrameLoaderStateMachine::firstLayoutDone() const
+{
+    return m_state == FirstLayoutDone;
+}
+
+void FrameLoaderStateMachine::advanceTo(State state)
+{
+    ASSERT(State(m_state + 1) == state || (firstLayoutDone() && state == CommittedFirstRealLoad));
+    m_state = state;
+}
+
+} // namespace WebCore