Rename GrowableObjectArray to ListImplementation.

runtime/lib/array.dart

Index: runtime/lib/array.dart
===================================================================
--- runtime/lib/array.dart	(revision 507)
+++ runtime/lib/array.dart	(working copy)
@@ -9,7 +9,7 @@
 class ListFactory<T> {
 
   factory List.from(Iterable<T> other) {
-    GrowableObjectArray<T> list = new GrowableObjectArray<T>();
+    List<T> list = new List<T>();
     for (final e in other) {
       list.add(e);
     }
@@ -30,7 +30,7 @@
 
   factory List([int length = null]) {
     if (length === null) {
-      return new GrowableObjectArray<T>();
+      return new ListImplementation<T>();
     } else {
       return new ObjectArray<T>(length);
     }
@@ -98,7 +98,7 @@
   }
 
   Collection<T> filter(bool f(T element)) {
-    return Collections.filter(this, new GrowableObjectArray<T>(), f);
+    return Collections.filter(this, new List<T>(), f);
   }
 
   bool every(bool f(T element)) {
@@ -217,7 +217,7 @@
   }
 
   Collection<T> filter(bool f(T element)) {
-    return Collections.filter(this, new GrowableObjectArray<T>(), f);
+    return Collections.filter(this, new List<T>(), f);
   }
 
   bool every(bool f(T element)) {