Add ctrl+w accelerator to close bookmark manager for linux

chrome/browser/gtk/bookmark_manager_gtk.h

Index: chrome/browser/gtk/bookmark_manager_gtk.h
diff --git a/chrome/browser/gtk/bookmark_manager_gtk.h b/chrome/browser/gtk/bookmark_manager_gtk.h
index 261a05cfc0d343ad0d4107f570acbac2dd7a90cd..51745c6a6abc30317031556cc1d612a8c46bef27 100644
--- a/chrome/browser/gtk/bookmark_manager_gtk.h
+++ b/chrome/browser/gtk/bookmark_manager_gtk.h
@@ -79,6 +79,9 @@ class BookmarkManagerGtk : public BookmarkModelObserver,
   // Set |window_|'s initial size, using its previous size if that was saved.
   void SetInitialWindowSize();
 
+  // Connects the ctrl-w accelerator to the window.
+  void ConnectAccelerators();
+
   // If |left|, then make the organize menu refer to that which is selected in
   // the left pane, otherwise use the right pane selection.
   void ResetOrganizeMenu(bool left);
@@ -275,6 +278,13 @@ class BookmarkManagerGtk : public BookmarkModelObserver,
   }
   gboolean OnWindowConfigured(GtkWidget* window, GdkEventConfigure* event);
 
+  // Handles an accelerator being pressed.
+  static gboolean OnGtkAccelerator(GtkAccelGroup* accel_group,
+                                   GObject* acceleratable,
+                                   guint keyval,
+                                   GdkModifierType modifier,
+                                   BookmarkManagerGtk* bookmark_manager);
+
   GtkWidget* window_;
   GtkWidget* search_entry_;
   Profile* profile_;