WIP: Implement CSS transitions on top of InterpolationTypes instead of AnimatableValues

third_party/WebKit/Source/core/animation/AnimationStack.cpp

Index: third_party/WebKit/Source/core/animation/AnimationStack.cpp
diff --git a/third_party/WebKit/Source/core/animation/AnimationStack.cpp b/third_party/WebKit/Source/core/animation/AnimationStack.cpp
index 6c3eb2b51875629f3cdc93a6f1c2c0e4107c739d..77a58354c4b76c3bbbd23795f3906a9948d2686e 100644
--- a/third_party/WebKit/Source/core/animation/AnimationStack.cpp
+++ b/third_party/WebKit/Source/core/animation/AnimationStack.cpp
@@ -31,7 +31,6 @@
 #include "core/animation/AnimationStack.h"
 
 #include "core/animation/CompositorAnimations.h"
-#include "core/animation/InvalidatableInterpolation.h"
 #include "core/animation/css/CSSAnimations.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "wtf/NonCopyingSort.h"
@@ -51,8 +50,7 @@ void copyToActiveInterpolationsMap(const Vector<RefPtr<Interpolation>>& source,
         ActiveInterpolations& activeInterpolations = entry.storedValue->value;
         if (!entry.isNewEntry
             && (RuntimeEnabledFeatures::stackedCSSPropertyAnimationsEnabled() || !property.isCSSProperty() || property.isPresentationAttribute())
-            && interpolation->isInvalidatableInterpolation()
-            && toInvalidatableInterpolation(*interpolation).dependsOnUnderlyingValue()) {
+            && interpolation->dependsOnUnderlyingValue()) {
             activeInterpolations.append(interpolation.get());
         } else {
             activeInterpolations.at(0) = interpolation.get();