[breadcrumb] Add cr elements cr-action-menu to the build

Provides an aria-aware drop-down menu with keyboard/mouse/scroll events
support and allows clients to provide and style drop-down menu items.

Not used yet, so no change in behavior.

Tbr: alex
Bug: 1035691
Change-Id: Ib189e01ed95d6dc9e28d86e4db9d7cb20b4b9ca1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2094415Reviewed-by: Noel Gordon <noel@chromium.org>
Commit-Queue: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#748067}

ui/file_manager/file_manager/foreground/elements/elements_bundle.html

@@ -3,6 +3,7 @@
   -- found in the LICENSE file.
   -->
 
+<link rel="import" href="chrome://resources/cr_elements/cr_action_menu/cr_action_menu.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_button/cr_button.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_input/cr_input.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_icon_button/cr_icon_button.html">

ui/file_manager/file_manager/foreground/js/ui/BUILD.gn

@@ -123,6 +123,10 @@ js_library("banners") {
 }
 
 js_library("breadcrumb") {
+  deps = [
+    "//ui/webui/resources/cr_elements/cr_action_menu:cr_action_menu",
+    "//ui/webui/resources/js:assert",
+  ]
 }
 
 js_library("combobutton") {