Rename OutOfMemoryException to OutOfMemoryError.

lib/core/exceptions.dart

Index: lib/core/exceptions.dart
diff --git a/lib/core/exceptions.dart b/lib/core/exceptions.dart
index e6ee7ac61cb07065273da5555881591374f705ca..c57603a76ee85ca82d8f43421015be3a24caa549 100644
--- a/lib/core/exceptions.dart
+++ b/lib/core/exceptions.dart
@@ -8,11 +8,21 @@
  * Interface implemented by all core library exceptions.
  * Defaults to an implementation that only carries a simple message.
  */
-interface Exception default ExceptionImplementation {
+interface Exception default _ExceptionImplementation {
+  // TODO(lrn): This should be an abstract class, but we don't yet support
+  // redirecting factory constructors.
   const Exception([var message]);
 }
 
 
+/** Default implementation of [Exception] which carries a message. */
+class _ExceptionImplementation implements Exception {
+  final message;
+  const _ExceptionImplementation([this.message]);
+  String toString() => (message == null) ? "Exception" : "Exception: $message";
+}
+
+
 /**
  * Exception thrown because of an index outside of the valid range.
  */
@@ -24,7 +34,6 @@ class IndexOutOfRangeException implements Exception {
   final _value;
 }
 
-
 /**
  * Exception thrown because of attempt to modify an immutable object.
  */
@@ -46,12 +55,6 @@ class ObjectNotClosureException implements Exception {
 }
 
 
-class OutOfMemoryException implements Exception {
-  const OutOfMemoryException();
-  String toString() => "Out of Memory";
-}
-
-
 class StackOverflowException implements Exception {
   const StackOverflowException();
   String toString() => "Stack Overflow";