Adding IE support to browser prefixes.

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

Index: lib/dom/templates/html/impl/impl_CSSStyleDeclaration.darttemplate
diff --git a/lib/dom/templates/html/impl/impl_CSSStyleDeclaration.darttemplate b/lib/dom/templates/html/impl/impl_CSSStyleDeclaration.darttemplate
index 63eb605a53f08014a21de21b240fb06a1a06ed23..db7d317ce046e3528686219c65841065c104ce5f 100644
--- a/lib/dom/templates/html/impl/impl_CSSStyleDeclaration.darttemplate
+++ b/lib/dom/templates/html/impl/impl_CSSStyleDeclaration.darttemplate
@@ -8,10 +8,13 @@ String get _browserPrefix() {
   if (_cachedBrowserPrefix === null) {
     if (_Device.isFirefox) {
       _cachedBrowserPrefix = '-moz-';
+    } else if (_Device.isIE) {
+      _cachedBrowserPrefix = '-ms-';
+    } else if (_Device.isOpera) {
+      _cachedBrowserPrefix = '-o-';
     } else {
       _cachedBrowserPrefix = '-webkit-';
     }
-    // TODO(jacobr): support IE 9.0 and Opera as well.
   }
   return _cachedBrowserPrefix;
 }