Animation: Fix loss of type information when interpolating value of 0

Source/core/css/parser/SizesCalcParserTest.cpp

Index: Source/core/css/parser/SizesCalcParserTest.cpp
diff --git a/Source/core/css/parser/SizesCalcParserTest.cpp b/Source/core/css/parser/SizesCalcParserTest.cpp
index cefcc31a9fffa64d2d5685e69ec83ff2a477f4fd..a83c7bf457bb75edcd4fcbadcfca0356574a3127 100644
--- a/Source/core/css/parser/SizesCalcParserTest.cpp
+++ b/Source/core/css/parser/SizesCalcParserTest.cpp
@@ -29,14 +29,23 @@ static void initLengthArray(CSSLengthArray& lengthArray)
         lengthArray.at(i) = 0;
 }
 
+static void initLengthTypeArray(CSSLengthTypeArray& lengthTypeArray)
+{
+    lengthTypeArray.resize(CSSPrimitiveValue::LengthUnitTypeCount);
+    for (size_t i = 0; i < CSSPrimitiveValue::LengthUnitTypeCount; ++i)
+        lengthTypeArray.clear(i);
+}
+
 static void verifyCSSCalc(String text, double value, bool valid, unsigned fontSize, unsigned viewportWidth, unsigned viewportHeight)
 {
     CSSLengthArray lengthArray;
     initLengthArray(lengthArray);
+    CSSLengthTypeArray lengthTypeArray;
+    initLengthTypeArray(lengthTypeArray);
     RefPtrWillBeRawPtr<CSSValue> cssValue = CSSParser::parseSingleValue(CSSPropertyLeft, text);
     CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(cssValue.get());
     if (primitiveValue)
-        primitiveValue->accumulateLengthArray(lengthArray);
+        primitiveValue->accumulateLengthArray(lengthArray, lengthTypeArray);
     else
         ASSERT_EQ(valid, false);
     float length = lengthArray.at(CSSPrimitiveValue::UnitTypePixels);