Initial step of removing CSS zoom related properties.

sky/engine/core/animation/css/CSSAnimatableValueFactory.cpp

Index: sky/engine/core/animation/css/CSSAnimatableValueFactory.cpp
diff --git a/sky/engine/core/animation/css/CSSAnimatableValueFactory.cpp b/sky/engine/core/animation/css/CSSAnimatableValueFactory.cpp
index 635191ba2b7a368f7e6d2c41dabfaaab4e7c2357..84a5fbdfe6af815c7602bafedba29937b4478159 100644
--- a/sky/engine/core/animation/css/CSSAnimatableValueFactory.cpp
+++ b/sky/engine/core/animation/css/CSSAnimatableValueFactory.cpp
@@ -439,8 +439,6 @@ PassRefPtr<AnimatableValue> CSSAnimatableValueFactory::create(CSSPropertyID prop
         return AnimatableUnknown::create(CSSPrimitiveValue::create(style.verticalAlign()));
     case CSSPropertyZIndex:
         return createFromDouble(style.zIndex());
-    case CSSPropertyZoom:
-        return createFromDouble(style.zoom());
     default:
         ASSERT_NOT_REACHED();
         // This return value is to avoid a release crash if possible.