Add enumeration of the HTTP headers

runtime/bin/http.dart

Index: runtime/bin/http.dart
diff --git a/runtime/bin/http.dart b/runtime/bin/http.dart
index 2f5ee32f7c42c2630c79c6c2fd54663dafb25eff..c99424fb2de781910bc59741a9c89dfdb972f5c0 100644
--- a/runtime/bin/http.dart
+++ b/runtime/bin/http.dart
@@ -270,6 +270,13 @@ interface HttpHeaders default _HttpHeaders {
   void removeAll(String name);
 
   /**
+   * Enumerate the headers applying the function [f] to each
+   * header. The header names in passed in [name] will be all lower

[Anders Johnsen, 2012/05/07 13:21:27]

This sounds odd. :)

[Søren Gjesse, 2012/05/07 13:51:46]

The HTTP header names are case insensitive (defined in the spec.). For
simplicity they are internally converted to all lowercase and the original
string thrown away.

+   * case.
+   */
+  void forEach(void f(String name, List<String> values));
+
+  /**
    * Gets and sets the date. The value of this property will
    * reflect the "Date" header
    */