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

Source/core/css/CSSCalculationValueTest.cpp

Index: Source/core/css/CSSCalculationValueTest.cpp
diff --git a/Source/core/css/CSSCalculationValueTest.cpp b/Source/core/css/CSSCalculationValueTest.cpp
index 14476a8462b42e813fe1b57e5417b9b5338a7b03..8b7ca6b63915ab8d9d1a44e5809980d5f2c3a9cf 100644
--- a/Source/core/css/CSSCalculationValueTest.cpp
+++ b/Source/core/css/CSSCalculationValueTest.cpp
@@ -69,12 +69,20 @@ void initLengthArray(CSSLengthArray& lengthArray)
         lengthArray.at(i) = 0;
 }
 
-CSSLengthArray& setLengthArray(CSSLengthArray& lengthArray, String text)
+void initLengthTypeArray(CSSLengthTypeArray& lengthTypeArray)
+{
+    lengthTypeArray.resize(CSSPrimitiveValue::LengthUnitTypeCount);
+    for (size_t i = 0; i < CSSPrimitiveValue::LengthUnitTypeCount; ++i)
+        lengthTypeArray.clear(i);
+}
+
+CSSLengthArray& setLengthArray(CSSLengthArray& lengthArray, CSSLengthTypeArray& lengthTypeArray, String text)
 {
     initLengthArray(lengthArray);
+    initLengthTypeArray(lengthTypeArray);
     RefPtrWillBeRawPtr<MutableStylePropertySet> propertySet = MutableStylePropertySet::create();
     propertySet->setProperty(CSSPropertyLeft, text);
-    toCSSPrimitiveValue(propertySet->getPropertyCSSValue(CSSPropertyLeft).get())->accumulateLengthArray(lengthArray);
+    toCSSPrimitiveValue(propertySet->getPropertyCSSValue(CSSPropertyLeft).get())->accumulateLengthArray(lengthArray, lengthTypeArray);
     return lengthArray;
 }
 
@@ -171,28 +179,30 @@ TEST(CSSCalculationValue, RefCountLeak)
 TEST(CSSCalculationValue, AddToLengthUnitValues)
 {
     CSSLengthArray expectation, actual;
+    CSSLengthTypeArray expectedType, actualType;
     initLengthArray(expectation);
-    EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, "0")));
+    initLengthTypeArray(expectedType);
+    EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, actualType, "0")));
 
     expectation.at(CSSPrimitiveValue::UnitTypePixels) = 10;
-    EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, "10px")));
+    EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, actualType, "10px")));
 
     expectation.at(CSSPrimitiveValue::UnitTypePixels) = 0;
     expectation.at(CSSPrimitiveValue::UnitTypePercentage) = 20;
-    EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, "20%")));
+    EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, actualType, "20%")));
 
     expectation.at(CSSPrimitiveValue::UnitTypePixels) = 30;
     expectation.at(CSSPrimitiveValue::UnitTypePercentage) = -40;
-    EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, "calc(30px - 40%)")));
+    EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, actualType, "calc(30px - 40%)")));
 
     expectation.at(CSSPrimitiveValue::UnitTypePixels) = 90;
     expectation.at(CSSPrimitiveValue::UnitTypePercentage) = 10;
-    EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, "calc(1in + 10% - 6px)")));
+    EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, actualType, "calc(1in + 10% - 6px)")));
 
     expectation.at(CSSPrimitiveValue::UnitTypePixels) = 15;
     expectation.at(CSSPrimitiveValue::UnitTypeFontSize) = 20;
     expectation.at(CSSPrimitiveValue::UnitTypePercentage) = -40;
-    EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, "calc((1 * 2) * (5px + 20em / 2) - 80% / (3 - 1) + 5px)")));
+    EXPECT_TRUE(lengthArraysEqual(expectation, setLengthArray(actual, actualType, "calc((1 * 2) * (5px + 20em / 2) - 80% / (3 - 1) + 5px)")));
 }
 
 }