Revert of Implement timers by posting delayed tasks

Source/platform/ThreadTimers.h

Index: Source/platform/ThreadTimers.h
diff --git a/Source/platform/ThreadTimers.h b/Source/platform/ThreadTimers.h
new file mode 100644
index 0000000000000000000000000000000000000000..031f4a7c15f43fa65ef13cecd1ee751d70d90b3c
--- /dev/null
+++ b/Source/platform/ThreadTimers.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
+ * 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:
+ * 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.
+ */
+
+#ifndef ThreadTimers_h
+#define ThreadTimers_h
+
+#include "platform/PlatformExport.h"
+#include "platform/SharedTimer.h"
+#include "wtf/Noncopyable.h"
+#include "wtf/HashSet.h"
+#include "wtf/Vector.h"
+
+namespace blink {
+
+class TimerBase;
+
+// A collection of timers per thread. Kept in PlatformThreadData.
+class PLATFORM_EXPORT ThreadTimers {
+    WTF_MAKE_NONCOPYABLE(ThreadTimers); WTF_MAKE_FAST_ALLOCATED(ThreadTimers);
+public:
+    ThreadTimers();
+
+    // On a thread different then main, we should set the thread's instance of the SharedTimer.
+    void setSharedTimer(WTF::PassOwnPtr<SharedTimer>);
+
+    Vector<TimerBase*>& timerHeap() { return m_timerHeap; }
+
+    void updateSharedTimer();
+    double nextFireTime() const { return m_pendingSharedTimerFireTime; }
+
+private:
+    static void sharedTimerFired();
+
+    void sharedTimerFiredInternal();
+
+    Vector<TimerBase*> m_timerHeap;
+    OwnPtr<SharedTimer> m_sharedTimer;
+    bool m_firingTimers; // Reentrancy guard.
+    double m_pendingSharedTimerFireTime;
+};
+
+}
+
+#endif