'Moved all documentation from old .dartdoc files.'

tools/dom/templates/html/impl/impl_Storage.darttemplate

Index: tools/dom/templates/html/impl/impl_Storage.darttemplate
diff --git a/tools/dom/templates/html/impl/impl_Storage.darttemplate b/tools/dom/templates/html/impl/impl_Storage.darttemplate
index 7cde516b1aeb889f9cf0acc777297c362c84b5a6..e4d05237195e1361a3515192bea9f6346b9e5963 100644
--- a/tools/dom/templates/html/impl/impl_Storage.darttemplate
+++ b/tools/dom/templates/html/impl/impl_Storage.darttemplate
@@ -4,6 +4,31 @@
 
 part of $LIBRARYNAME;
 
+/**
+ * The type used by the
+ * [Window.localStorage] and [Window.sessionStorage] properties.
+ * Storage is implemented as a Map<String, String>.
+ *
+ * To store and get values, use Dart's built-in map syntax:
+ *
+ *     window.localStorage['key1'] = 'val1';
+ *     window.localStorage['key2'] = 'val2';
+ *     window.localStorage['key3'] = 'val3';
+ *     assert(window.localStorage['key3'] == 'val3');
+ *
+ * You can use [Map](http://api.dartlang.org/dart_core/Map.html) APIs
+ * such as containsValue(), clear(), and length:
+ *
+ *     assert(window.localStorage.containsValue('does not exist') == false);
+ *     window.localStorage.clear();
+ *     assert(window.localStorage.length == 0);
+ *
+ * For more examples of using this API, see
+ * [localstorage_test.dart](http://code.google.com/p/dart/source/browse/branches/bleeding_edge/dart/tests/html/localstorage_test.dart).
+ * For details on using the Map API, see the
+ * [Maps](http://www.dartlang.org/docs/library-tour/#maps-aka-dictionaries-or-hashes)
+ * section of the library tour.
+ */
 $(ANNOTATIONS)class $CLASSNAME$EXTENDS implements Map<String, String>
     $NATIVESPEC {