Move extension pop-ups and notifications to the new auto-resize code.

chrome/browser/notifications/balloon_collection_impl.h

Index: chrome/browser/notifications/balloon_collection_impl.h
diff --git a/chrome/browser/notifications/balloon_collection_impl.h b/chrome/browser/notifications/balloon_collection_impl.h
index f505463680a26cf7a5b64c4771c9a731743406b0..1e4ceb03f1cec800e9f6bc68a62310b1ba0161a8 100644
--- a/chrome/browser/notifications/balloon_collection_impl.h
+++ b/chrome/browser/notifications/balloon_collection_impl.h
@@ -76,6 +76,11 @@ class BalloonCollectionImpl : public BalloonCollection,
   // balloons in the collection.
   int count() const { return base_.count(); }
 
+  static int min_balloon_width() { return Layout::min_balloon_width(); }
+  static int max_balloon_width() { return Layout::max_balloon_width(); }
+  static int min_balloon_height() { return Layout::min_balloon_height(); }
+  static int max_balloon_height() { return Layout::max_balloon_height(); }
+
  protected:
   // Calculates layout values for the balloons including
   // the scaling, the max/min sizes, and the upper left corner of each.