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

Source/core/animation/StringKeyframe.cpp

Index: Source/core/animation/StringKeyframe.cpp
diff --git a/Source/core/animation/StringKeyframe.cpp b/Source/core/animation/StringKeyframe.cpp
index 9bf01dceb20993e21f45196a6c2e5184a43261bb..b28c1f8672792925b0893bd35c0af2f6fcaed03e 100644
--- a/Source/core/animation/StringKeyframe.cpp
+++ b/Source/core/animation/StringKeyframe.cpp
@@ -137,6 +137,17 @@ PassRefPtrWillBeRawPtr<Interpolation> StringKeyframe::PropertySpecificKeyframe::
     case CSSPropertyWebkitTextStrokeColor:
         if (ColorStyleInterpolation::canCreateFrom(*fromCSSValue) && ColorStyleInterpolation::canCreateFrom(*toCSSValue))
             return ColorStyleInterpolation::create(*fromCSSValue, *toCSSValue, property);
+    case CSSPropertyBorderBottomLeftRadius:
+    case CSSPropertyBorderBottomRightRadius:
+    case CSSPropertyBorderTopLeftRadius:
+    case CSSPropertyBorderTopRightRadius:
+    case CSSPropertyPerspectiveOrigin:

[Eric Willigers, 2014/12/19 05:05:52]

PerspectiveOrigin can be negative:
MDN - https://developer.mozilla.org/en-US/docs/Web/CSS/perspective-origin
Experiment - http://jsfiddle.net/ericwilligers/ud5aado3/

[evemj (not active), 2014/12/20 05:57:45]

Done.

+        range = ValueRangeNonNegative;
+        // Fall through
+    case CSSPropertyObjectPosition:
+        if (LengthPairStyleInterpolation::canCreateFrom(*fromCSSValue) && LengthPairStyleInterpolation::canCreateFrom(*toCSSValue))
+            return LengthPairStyleInterpolation::create(*fromCSSValue, *toCSSValue, property, range);
+        break;
     default:
         break;
     }