bookmarks: BookmarkNodeData's size() cleanups.

components/bookmarks/browser/bookmark_node_data.h

Index: components/bookmarks/browser/bookmark_node_data.h
diff --git a/components/bookmarks/browser/bookmark_node_data.h b/components/bookmarks/browser/bookmark_node_data.h
index fd7d13d824980a0dc11bf18dabcc115e753d95bc..6f6683d14ea562656965a4345f0cf81bcbc89312 100644
--- a/components/bookmarks/browser/bookmark_node_data.h
+++ b/components/bookmarks/browser/bookmark_node_data.h
@@ -149,12 +149,14 @@ struct BookmarkNodeData {
   // Do we contain valid data?
   bool is_valid() const { return !elements.empty(); }
 
-  // Returns true if there is a single url.
-  bool has_single_url() const { return is_valid() && elements[0].is_url; }

[sky, 2015/01/28 21:11:58]

Is there a reason to move this?

[tfarina, 2015/01/29 00:10:13]

Done.

-
   // Number of elements.
   size_t size() const { return elements.size(); }
 
+  // Returns true if there is a single url.
+  bool has_single_url() const {
+    return size() == 1 && elements[0].is_url;
+  }
+
   // Clears the data.
   void Clear();