GTK: Make folder tree views expand columns properly, also refactor the code i...

chrome/browser/gtk/bookmark_tree_model.h

Index: chrome/browser/gtk/bookmark_tree_model.h
===================================================================
--- chrome/browser/gtk/bookmark_tree_model.h	(revision 22391)
+++ chrome/browser/gtk/bookmark_tree_model.h	(working copy)
@@ -15,6 +15,7 @@
 typedef struct _GtkTreeModel GtkTreeModel;
 typedef struct _GtkTreeStore GtkTreeStore;
 typedef struct _GdkPixbuf GdkPixbuf;
+typedef struct _GtkWidget GtkWidget;
 
 namespace bookmark_utils {
 
@@ -46,6 +47,10 @@
                       GtkTreeStore* store, GtkTreeIter* selected_iter,
                       GtkTreeIter* parent);
 
+// Makes a tree view for the store. This will take ownership of |store| and the
+// returned widget has a floating reference.
+GtkWidget* MakeTreeViewForStore(GtkTreeStore* store);
+
 // Commits changes to a GtkTreeStore built from BuildTreeStoreFrom() back
 // into the BookmarkModel it was generated from.  Returns the BookmarkNode that
 // represented by |selected|.