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diff --git a/chromium/third_party/WebKit/Source/core/animation/AnimationNode.h b/chromium/third_party/WebKit/Source/core/animation/AnimationNode.h
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+++ b/chromium/third_party/WebKit/Source/core/animation/AnimationNode.h
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+/*
+ * Copyright (C) 2013 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.
+ */
+
+#ifndef AnimationNode_h
+#define AnimationNode_h
+
+#include "core/animation/Timing.h"
+#include "platform/heap/Handle.h"
+#include "wtf/OwnPtr.h"
+#include "wtf/PassOwnPtr.h"
+#include "wtf/RefCounted.h"
+
+namespace WebCore {
+
+class AnimationPlayer;
+class AnimationNode;
+class AnimationNodeTiming;
+
+enum TimingUpdateReason {
+    TimingUpdateOnDemand,
+    TimingUpdateForAnimationFrame
+};
+
+static inline bool isNull(double value)
+{
+    return std::isnan(value);
+}
+
+static inline double nullValue()
+{
+    return std::numeric_limits<double>::quiet_NaN();
+}
+
+class AnimationNode : public RefCountedWillBeGarbageCollectedFinalized<AnimationNode> {
+    friend class AnimationPlayer; // Calls attach/detach, updateInheritedTime.
+public:
+    // Note that logic in CSSAnimations depends on the order of these values.
+    enum Phase {
+        PhaseBefore,
+        PhaseActive,
+        PhaseAfter,
+        PhaseNone,
+    };
+
+    class EventDelegate {
+    public:
+        virtual ~EventDelegate() { };
+        virtual void onEventCondition(const AnimationNode*) = 0;
+    };
+
+    virtual ~AnimationNode() { }
+
+    virtual bool isAnimation() const { return false; }
+
+    Phase phase() const { return ensureCalculated().phase; }
+    bool isCurrent() const { return ensureCalculated().isCurrent; }
+    bool isInEffect() const { return ensureCalculated().isInEffect; }
+    bool isInPlay() const { return ensureCalculated().isInPlay; }
+    double timeToForwardsEffectChange() const { return ensureCalculated().timeToForwardsEffectChange; }
+    double timeToReverseEffectChange() const { return ensureCalculated().timeToReverseEffectChange; }
+
+    double currentIteration() const { return ensureCalculated().currentIteration; }
+    double iterationDuration() const;
+
+    // This method returns time in ms as it is unused except via the API.
+    double duration() const { return iterationDuration() * 1000; }
+
+    double activeDuration() const { return activeDurationInternal() * 1000; }
+    double activeDurationInternal() const;
+    double timeFraction() const { return ensureCalculated().timeFraction; }
+    double startTime() const { return m_startTime * 1000; }
+    double startTimeInternal() const { return m_startTime; }
+    double endTime() const { return endTimeInternal() * 1000; }
+    double endTimeInternal() const { return startTime() + specifiedTiming().startDelay + activeDurationInternal() + specifiedTiming().endDelay; }
+
+    const AnimationPlayer* player() const { return m_player; }
+    AnimationPlayer* player() { return m_player; }
+    AnimationPlayer* player(bool& isNull) { isNull = !m_player; return m_player; }
+    const Timing& specifiedTiming() const { return m_timing; }
+    PassRefPtrWillBeRawPtr<AnimationNodeTiming> timing();
+    void updateSpecifiedTiming(const Timing&);
+
+    // This method returns time in ms as it is unused except via the API.
+    double localTime(bool& isNull) const { isNull = !m_player; return ensureCalculated().localTime * 1000; }
+    double currentIteration(bool& isNull) const { isNull = !ensureCalculated().isInEffect; return ensureCalculated().currentIteration; }
+
+    virtual void trace(Visitor*);
+
+protected:
+    explicit AnimationNode(const Timing&, PassOwnPtr<EventDelegate> = nullptr);
+
+    // When AnimationNode receives a new inherited time via updateInheritedTime
+    // it will (if necessary) recalculate timings and (if necessary) call
+    // updateChildrenAndEffects.
+    void updateInheritedTime(double inheritedTime, TimingUpdateReason) const;
+    void invalidate() const { m_needsUpdate = true; };
+    bool hasEvents() const { return m_eventDelegate; }
+    void clearEventDelegate() { m_eventDelegate = nullptr; }
+
+    virtual void attach(AnimationPlayer* player)
+    {
+        m_player = player;
+    }
+
+    virtual void detach()
+    {
+        ASSERT(m_player);
+        m_player = nullptr;
+    }
+
+    double repeatedDuration() const;
+
+    virtual void updateChildrenAndEffects() const = 0;
+    virtual double intrinsicIterationDuration() const { return 0; };
+    virtual double calculateTimeToEffectChange(bool forwards, double localTime, double timeToNextIteration) const = 0;
+    virtual void specifiedTimingChanged() { }
+
+    // FIXME: m_parent and m_startTime are placeholders, they depend on timing groups.
+    RawPtrWillBeMember<AnimationNode> m_parent;
+    const double m_startTime;
+    RawPtrWillBeMember<AnimationPlayer> m_player;
+    Timing m_timing;
+    OwnPtr<EventDelegate> m_eventDelegate;
+
+    mutable struct CalculatedTiming {
+        Phase phase;
+        double currentIteration;
+        double timeFraction;
+        bool isCurrent;
+        bool isInEffect;
+        bool isInPlay;
+        double localTime;
+        double timeToForwardsEffectChange;
+        double timeToReverseEffectChange;
+    } m_calculated;
+    mutable bool m_needsUpdate;
+    mutable double m_lastUpdateTime;
+
+    const CalculatedTiming& ensureCalculated() const;
+};
+
+} // namespace WebCore
+
+#endif