Use a transformer to initialize custom elements and call initMethod. This is the

pkg/polymer/CHANGELOG.md

Index: pkg/polymer/CHANGELOG.md
diff --git a/pkg/polymer/CHANGELOG.md b/pkg/polymer/CHANGELOG.md
index 01e65d6ee78a189f27e96ee138a4176723fc9f90..d732a8884cec3f1928fef07f52029ffd624442be 100644
--- a/pkg/polymer/CHANGELOG.md
+++ b/pkg/polymer/CHANGELOG.md
@@ -5,6 +5,15 @@ package. We will also note important changes to the polyfill packages if they
 impact polymer: custom_element, html_import, observe, shadow_dom,
 and template_binding.
 
+#### Pub version 0.10.0-dev
+  * Deploy step removes use of mirrors to initialize polymer elements. Mirrors
+    are still used for @published and for polymer-expressions.
+    **breaking change**: @initMethod and @CustomTag are only supported on
+    public classes/methods.
+
+#### Pub version 0.9.5
+  * Improvements on how to handle cross-package HTML imports.
+
 #### Pub version 0.9.4
   * Removes unused dependency on csslib.