diff -r 000000000000 -r 4f2f89ce4247 WebCore/bindings/js/GCController.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/bindings/js/GCController.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2007 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:
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 COMPUTER, INC. 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 "GCController.h"
+
+#include "JSDOMWindow.h"
+#include <runtime/JSGlobalData.h>
+#include <runtime/JSLock.h>
+#include <runtime/Collector.h>
+#include <wtf/StdLibExtras.h>
+
+#if USE(PTHREADS)
+#include <pthread.h>
+#endif
+
+using namespace JSC;
+
+namespace WebCore {
+
+static void* collect(void*)
+{
+    JSLock lock(SilenceAssertionsOnly);
+    JSDOMWindow::commonJSGlobalData()->heap.collectAllGarbage();
+    return 0;
+}
+
+GCController& gcController()
+{
+    DEFINE_STATIC_LOCAL(GCController, staticGCController, ());
+    return staticGCController;
+}
+
+GCController::GCController()
+    : m_GCTimer(this, &GCController::gcTimerFired)
+{
+}
+
+void GCController::garbageCollectSoon()
+{
+    if (!m_GCTimer.isActive())
+        m_GCTimer.startOneShot(0);
+}
+
+void GCController::gcTimerFired(Timer<GCController>*)
+{
+    collect(0);
+}
+
+void GCController::garbageCollectNow()
+{
+    JSLock lock(SilenceAssertionsOnly);
+    if (!JSDOMWindow::commonJSGlobalData()->heap.isBusy())
+        collect(0);
+}
+
+void GCController::garbageCollectOnAlternateThreadForDebugging(bool waitUntilDone)
+{
+#if USE(PTHREADS)
+    pthread_t thread;
+    pthread_create(&thread, NULL, collect, NULL);
+
+    if (waitUntilDone)
+        pthread_join(thread, NULL);
+#endif
+}
+
+} // namespace WebCore