Handling transition animation between non-interpolable values.

third_party/WebKit/Source/core/animation/animatable/AnimatableLengthSize.cpp

 /*
  * 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
@@ skipping 28 matching lines @@
         AnimatableValue::interpolate(this->width(), lengthSize->width(), fraction),
         AnimatableValue::interpolate(this->height(), lengthSize->height(), fraction));
 }
 
 bool AnimatableLengthSize::equalTo(const AnimatableValue* value) const
 {
     const AnimatableLengthSize* lengthSize = toAnimatableLengthSize(value);
     return width()->equals(lengthSize->width()) && height()->equals(lengthSize->height());
 }
 
+bool AnimatableLengthSize::usesDefaultInterpolationWith(const AnimatableValue* other) const
+{
+    const AnimatableLengthSize* lengthSize = toAnimatableLengthSize(other);
+    return usesDefaultInterpolation(this->width(), lengthSize->width())
+        || usesDefaultInterpolation(this->height(), lengthSize->height());

[alancutter (OOO until 2018), 2016/02/28 23:14:21]

"this->" is redundant and can be removed.

+}
+
 } // namespace blink