Devtools Animations: Update transition timing on timeline interaction

Source/core/animation/KeyframeEffectModel.cpp

Index: Source/core/animation/KeyframeEffectModel.cpp
diff --git a/Source/core/animation/KeyframeEffectModel.cpp b/Source/core/animation/KeyframeEffectModel.cpp
index 001535c216868570e124dd9c24e621eb0ab29f2f..7e2c35860751dc3a009f5ebf091956fa9b473355 100644
--- a/Source/core/animation/KeyframeEffectModel.cpp
+++ b/Source/core/animation/KeyframeEffectModel.cpp
@@ -55,6 +55,14 @@ PropertySet KeyframeEffectModelBase::properties() const
     return result;
 }
 
+void KeyframeEffectModelBase::setFrames(KeyframeVector& keyframes)
+{
+    // TODO(samli): Should also notify/invalidate the player
+    m_keyframes = keyframes;
+    m_keyframeGroups = nullptr;
+    m_interpolationEffect = nullptr;
+}
+
 void KeyframeEffectModelBase::sample(int iteration, double fraction, double iterationDuration, OwnPtrWillBeRawPtr<WillBeHeapVector<RefPtrWillBeMember<Interpolation>>>& result) const
 {
     ASSERT(iteration >= 0);