Make flex-grow and flex-shrink interpolation continuous with 0

Source/core/animation/css/CSSAnimatableValueFactory.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 94 matching lines @@
     if (length.type() == Percent) {
         double value = length.value();
         // -100% is used to represent "normal" line height.
         if (value == -100)
             return AnimatableUnknown::create(CSSValueNormal);
         return AnimatableDouble::create(value);
     }
     return createFromLength(length, style);
 }
 
-inline static PassRefPtrWillBeRawPtr<AnimatableValue> createFromDouble(double value, AnimatableDouble::Constraint constraint = AnimatableDouble::Unconstrained)
+inline static PassRefPtrWillBeRawPtr<AnimatableValue> createFromDouble(double value)
 {
-    return AnimatableDouble::create(value, constraint);
+    return AnimatableDouble::create(value);
 }
 
 inline static PassRefPtrWillBeRawPtr<AnimatableValue> createFromLengthBox(const LengthBox& lengthBox, const ComputedStyle& style)
 {
     return AnimatableLengthBox::create(
         createFromLength(lengthBox.left(), style),
         createFromLength(lengthBox.right(), style),
         createFromLength(lengthBox.top(), style),
         createFromLength(lengthBox.bottom(), style));
 }
@@ skipping 244 matching lines @@
     case CSSPropertyColor:
         return createFromColor(property, style);
     case CSSPropertyFillOpacity:
         return createFromDouble(style.fillOpacity());
     case CSSPropertyFill:
         return AnimatableSVGPaint::create(
             normalizeSVGPaintType(style.svgStyle().fillPaintType()), normalizeSVGPaintType(style.svgStyle().visitedLinkFillPaintType()),
             style.svgStyle().fillPaintColor(), style.svgStyle().visitedLinkFillPaintColor(),
             style.svgStyle().fillPaintUri(), style.svgStyle().visitedLinkFillPaintUri());
     case CSSPropertyFlexGrow:
-        return createFromDouble(style.flexGrow(), AnimatableDouble::InterpolationIsNonContinuousWithZero);
+        return createFromDouble(style.flexGrow());
     case CSSPropertyFlexShrink:
-        return createFromDouble(style.flexShrink(), AnimatableDouble::InterpolationIsNonContinuousWithZero);
+        return createFromDouble(style.flexShrink());
     case CSSPropertyFlexBasis:
         return createFromLength(style.flexBasis(), style);
     case CSSPropertyFloodColor:
         return createFromColor(property, style);
     case CSSPropertyFloodOpacity:
         return createFromDouble(style.floodOpacity());
     case CSSPropertyFontSize:
         // Must pass a specified size to setFontSize if Text Autosizing is enabled, but a computed size
         // if text zoom is enabled (if neither is enabled it's irrelevant as they're probably the same).
         // FIXME: Should we introduce an option to pass the computed font size here, allowing consumers to
@@ skipping 116 matching lines @@
         return createFromBorderImageLengthBox(style.maskBoxImageWidth(), style);
     case CSSPropertyWebkitMaskImage:
         return createFromFillLayers<CSSPropertyWebkitMaskImage>(style.maskLayers(), style);
     case CSSPropertyWebkitMaskPositionX:
         return createFromFillLayers<CSSPropertyWebkitMaskPositionX>(style.maskLayers(), style);
     case CSSPropertyWebkitMaskPositionY:
         return createFromFillLayers<CSSPropertyWebkitMaskPositionY>(style.maskLayers(), style);
     case CSSPropertyWebkitMaskSize:
         return createFromFillLayers<CSSPropertyWebkitMaskSize>(style.maskLayers(), style);
     case CSSPropertyPerspective:
-        return createFromDouble(style.perspective(), AnimatableDouble::InterpolationIsNonContinuousWithZero);
+        if (style.perspective() == 0)
+            return AnimatableUnknown::create(CSSPrimitiveValue::createIdentifier(CSSValueNone));
+        return createFromDouble(style.perspective());
     case CSSPropertyPerspectiveOrigin:
         return createFromLengthPoint(style.perspectiveOrigin(), style);
     case CSSPropertyShapeOutside:
         return createFromShapeValue(style.shapeOutside());
     case CSSPropertyShapeMargin:
         return createFromLength(style.shapeMargin(), style);
     case CSSPropertyShapeImageThreshold:
         return createFromDouble(style.shapeImageThreshold());
     case CSSPropertyWebkitTextStrokeColor:
         return createFromColor(property, style);
@@ skipping 57 matching lines @@
         if (style.hasAutoZIndex())
             return AnimatableUnknown::create(CSSValueAuto);
         return createFromDouble(style.zIndex());
     default:
         ASSERT_NOT_REACHED();
         return nullptr;
     }
 }
 
 } // namespace blink