Animations: Smooth interpolation for translate none

third_party/WebKit/Source/core/animation/CSSTranslateInterpolationType.h

Index: third_party/WebKit/Source/core/animation/CSSTranslateInterpolationType.h
diff --git a/third_party/WebKit/Source/core/animation/CSSTranslateInterpolationType.h b/third_party/WebKit/Source/core/animation/CSSTranslateInterpolationType.h
index d2db4943bcd3bae377ae18527b13227ac9692346..4a2759aeb18d7b96abe1799349c38bcb6cb08d14 100644
--- a/third_party/WebKit/Source/core/animation/CSSTranslateInterpolationType.h
+++ b/third_party/WebKit/Source/core/animation/CSSTranslateInterpolationType.h
@@ -18,6 +18,10 @@ class CSSTranslateInterpolationType : public CSSInterpolationType {
 
   InterpolationValue maybeConvertStandardPropertyUnderlyingValue(
       const ComputedStyle&) const final;
+  void composite(UnderlyingValueOwner&,
+                 double underlyingFraction,
+                 const InterpolationValue&,
+                 double interpolationFraction) const final;
   void applyStandardPropertyValue(const InterpolableValue&,
                                   const NonInterpolableValue*,
                                   StyleResolverState&) const final;
@@ -32,6 +36,10 @@ class CSSTranslateInterpolationType : public CSSInterpolationType {
   InterpolationValue maybeConvertValue(const CSSValue&,
                                        const StyleResolverState*,
                                        ConversionCheckers&) const final;
+
+  PairwiseInterpolationValue maybeMergeSingles(
+      InterpolationValue&&,
+      InterpolationValue&&) const final;
 };
 
 }  // namespace blink