Revert "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 c57603a76ee85ca82d8f43421015be3a24caa549..e6ee7ac61cb07065273da5555881591374f705ca 100644
--- a/lib/core/exceptions.dart
+++ b/lib/core/exceptions.dart
@@ -8,21 +8,11 @@
  * Interface implemented by all core library exceptions.
  * Defaults to an implementation that only carries a simple message.
  */
-interface Exception default _ExceptionImplementation {
-  // TODO(lrn): This should be an abstract class, but we don't yet support
-  // redirecting factory constructors.
+interface Exception default ExceptionImplementation {
   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.
  */
@@ -34,6 +24,7 @@ class IndexOutOfRangeException implements Exception {
   final _value;
 }
 
+
 /**
  * Exception thrown because of attempt to modify an immutable object.
  */
@@ -55,6 +46,12 @@ 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";