Small changes to get the compilation size of code importing dart:html shorter.

lib/compiler/implementation/ssa/builder.dart

Index: lib/compiler/implementation/ssa/builder.dart
===================================================================
--- lib/compiler/implementation/ssa/builder.dart	(revision 11226)
+++ lib/compiler/implementation/ssa/builder.dart	(working copy)
@@ -3582,14 +3582,7 @@
   }
 
   void visitSend(Node node) {
-    Element element = elements[node];
-    // Native methods rely on the names of the arguments. If we inline they
-    // could change.
-    if (!Element.isInvalid(element) && element.kind == ElementKind.FOREIGN) {
-      tooDifficult = true;
-    } else {
-      node.visitChildren(this);
-    }
+    node.visitChildren(this);
   }
 
   visitLoop(Node node) {