Add runtime feature and property names for unprefixed CSS Transforms

Source/core/css/CSSComputedStyleDeclaration.cpp

Index: Source/core/css/CSSComputedStyleDeclaration.cpp
diff --git a/Source/core/css/CSSComputedStyleDeclaration.cpp b/Source/core/css/CSSComputedStyleDeclaration.cpp
index df4b2313f8b2e465e57ed5e243a90feace7e26b9..4ffe7df91ce6dbd3a8f8ef97ebc7ae56d12c0207 100644
--- a/Source/core/css/CSSComputedStyleDeclaration.cpp
+++ b/Source/core/css/CSSComputedStyleDeclaration.cpp
@@ -2768,6 +2768,15 @@ PassRefPtrWillBeRawPtr<CSSValue> CSSComputedStyleDeclaration::getPropertyCSSValu
             ASSERT_NOT_REACHED();
             break;
 
+        // FIXME: crbug.com/154772 Unimplemented css-transforms properties
+        case CSSPropertyBackfaceVisibility:
+        case CSSPropertyPerspective:
+        case CSSPropertyPerspectiveOrigin:
+        case CSSPropertyTransform:
+        case CSSPropertyTransformOrigin:
+        case CSSPropertyTransformStyle:
+            break;
+
         /* Unimplemented @font-face properties */
         case CSSPropertyFontStretch:
         case CSSPropertySrc: