Animation: Implement DoubleStyleInterpolation in StringKeyframe

Source/core/animation/DoubleStyleInterpolation.cpp

Index: Source/core/animation/DoubleStyleInterpolation.cpp
diff --git a/Source/core/animation/DoubleStyleInterpolation.cpp b/Source/core/animation/DoubleStyleInterpolation.cpp
index 86e2286c2996a905875a4aa809d4efe90b5796cd..2d30be747dfb7f3e7f87a724f2f766fb573e9659 100644
--- a/Source/core/animation/DoubleStyleInterpolation.cpp
+++ b/Source/core/animation/DoubleStyleInterpolation.cpp
@@ -32,20 +32,29 @@ PassRefPtrWillBeRawPtr<CSSValue> DoubleStyleInterpolation::interpolableValueToDo
 {
     ASSERT(value->isNumber());
     double doubleValue = toInterpolableNumber(value)->value();
-
     switch (clamp) {
-    case RangeOpacityFIXME:
-        doubleValue = clampTo<float>(doubleValue, 0, nextafterf(1, 0));
+    case RangeAll:
+        // Do nothing
+        break;
+    case RangeFloatFractions:
+        doubleValue = clampTo<float>(doubleValue, 0, nextafter(1, 0));
+        break;
+    case RangeFloor:
+        doubleValue = floor(doubleValue);
+        break;
+    case RangeDoubleFractions:
+        doubleValue = clampTo<double>(doubleValue, 0.000000000000000000000000000000000000000000001);

[Eric Willigers, 2015/01/28 22:24:44]

Consider using
  clampTo<double>(doubleValue, std::numeric_limits<double>::denorm_min());
like AnimatedStyleBuilder.cpp's case CSSPropertyZoom

See http://en.cppreference.com/w/cpp/types/numeric_limits/denorm_min

+        break;
+    case RangeCeiling:
+        doubleValue = clampTo<int>((doubleValue + 0.5), 1);
+        break;
+    case RangeGreaterThanOne:
+        doubleValue = clampTo<float>(doubleValue, 1);
         break;
     case RangeNonNegative:
         doubleValue = clampTo<float>(doubleValue, 0);
         break;
-    case RangeAll:
-        break;
-    default:
-        ASSERT_NOT_REACHED();
     }
-
     if (isNumber)
         return CSSPrimitiveValue::create(doubleValue, CSSPrimitiveValue::CSS_NUMBER);
     return CSSPrimitiveValue::create(doubleValue, CSSPrimitiveValue::CSS_DEG);