dart2js: mark FunctionElements as dependencies always

pkg/compiler/lib/src/deferred_load.dart

Index: pkg/compiler/lib/src/deferred_load.dart
diff --git a/pkg/compiler/lib/src/deferred_load.dart b/pkg/compiler/lib/src/deferred_load.dart
index 937e620ef9a1c5d92aa6db17a7d585e3066992fc..b8effae5e3696847b79bfbebfec11b736d4a2e26 100644
--- a/pkg/compiler/lib/src/deferred_load.dart
+++ b/pkg/compiler/lib/src/deferred_load.dart
@@ -264,6 +264,8 @@ class DeferredLoadTask extends CompilerTask {
 
     /// Recursively collects all the dependencies of [type].
     void collectTypeDependencies(DartType type) {
+      // TODO(het): we would like to separate out types that are only needed for
+      // rti from types that are needed for their members.

[sigurdm, 2015/10/13 07:39:07]

I think johnniwinther is working on this.

       if (type is GenericType) {
         type.typeArguments.forEach(collectTypeDependencies);
       }
@@ -341,8 +343,7 @@ class DeferredLoadTask extends CompilerTask {
       }
     }
 
-    if (element is FunctionElement &&
-        compiler.resolverWorld.closurizedMembers.contains(element)) {
+    if (element is FunctionElement) {
       collectTypeDependencies(element.type);
     }