Avoid SVG viewport bug for CSS length animations that don't use viewport units

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

Index: third_party/WebKit/Source/core/animation/LengthInterpolationFunctions.cpp
diff --git a/third_party/WebKit/Source/core/animation/LengthInterpolationFunctions.cpp b/third_party/WebKit/Source/core/animation/LengthInterpolationFunctions.cpp
index f3565e6ad2b42285e045280e01ab7843dad0a824..f4328718a1f8b925c05d74b182ab8a622fcb9328 100644
--- a/third_party/WebKit/Source/core/animation/LengthInterpolationFunctions.cpp
+++ b/third_party/WebKit/Source/core/animation/LengthInterpolationFunctions.cpp
@@ -149,6 +149,8 @@ Length LengthInterpolationFunctions::createLength(const InterpolableValue& inter
     double percentage = 0;
     for (size_t i = 0; i < CSSPrimitiveValue::LengthUnitTypeCount; i++) {
         double value = toInterpolableNumber(*interpolableList.get(i)).value();
+        if (value == 0)
+            continue;
         if (i == CSSPrimitiveValue::UnitTypePercentage) {
             percentage = value;
         } else {