Only Firefox needs the vendor prefix. All other browsers have both (webkit browsers) or the unprefi…

tools/dom/templates/html/impl/impl_CSSStyleDeclaration.darttemplate

Index: tools/dom/templates/html/impl/impl_CSSStyleDeclaration.darttemplate
diff --git a/tools/dom/templates/html/impl/impl_CSSStyleDeclaration.darttemplate b/tools/dom/templates/html/impl/impl_CSSStyleDeclaration.darttemplate
index aaa64e5d9fc99a7cd2c830dca21ba8a46e20972e..984f10d488dc72090da58ce0bfdccd9eed6f7568 100644
--- a/tools/dom/templates/html/impl/impl_CSSStyleDeclaration.darttemplate
+++ b/tools/dom/templates/html/impl/impl_CSSStyleDeclaration.darttemplate
@@ -918,12 +918,17 @@ $endif
   }
 
   /** Gets the value of "box-sizing" */
-  String get boxSizing =>
-    getPropertyValue('${Device.cssPrefix}box-sizing');
+  String get boxSizing => Device.isFirefox ? 
+      getPropertyValue('${Device.cssPrefix}box-sizing') : 
+      getPropertyValue('box-sizing');
 
   /** Sets the value of "box-sizing" */
   void set boxSizing(String value) {
-    setProperty('${Device.cssPrefix}box-sizing', value, '');
+    if (Device.isFirefox) {

[Jennifer Messerly, 2013/07/19 21:09:20]

presumably Firefox will implement this natively someday, and Dart code compiled
now would be broken. Perhaps the logic should get/set both properties?

+      setProperty('${Device.cssPrefix}box-sizing', value, '');
+    } else {
+      setProperty('box-sizing', value, '');
+    }
   }
 
   /** Gets the value of "caption-side" */