cocoa: give bookmarks menu an accessible title

chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_window.mm

Index: chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_window.mm
diff --git a/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_window.mm b/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_window.mm
index 31178191b460ea85eb73c792ce132c436ff485b2..1df630cfc454711a3b6cb5b8e1d98ffdc619e1df 100644
--- a/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_window.mm
+++ b/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_window.mm
@@ -8,7 +8,9 @@
 #import "base/mac/scoped_nsobject.h"
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_bar_constants.h"
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_controller.h"
+#include "chrome/grit/generated_resources.h"
 #import "third_party/google_toolbox_for_mac/src/AppKit/GTMNSColor+Luminance.h"
+#include "ui/base/l10n/l10n_util_mac.h"
 #include "ui/base/material_design/material_design_controller.h"
 
 using bookmarks::kBookmarkBarMenuCornerRadius;
@@ -20,6 +22,12 @@
 
 }  // namespace
 
+@interface BookmarkBarFolderWindow (Accessibility)
+
+- (NSString*)accessibilityTitle;
+
+@end
+
 @implementation BookmarkBarFolderWindow
 
 - (id)initWithContentRect:(NSRect)contentRect
@@ -48,6 +56,12 @@ - (BOOL)canBecomeMainWindow {
 - (void)keyDown:(NSEvent *)theEvent {
 }
 
+// If the menu doesn't have a separate accessibleTitle, it will get announced as
+// its normal window title, which is "BmbPopUpWindow".
+- (NSString*)accessibilityTitle {
+  return l10n_util::GetNSString(IDS_ACCNAME_BOOKMARKS_MENU);
+}
+
 @end