[MD Bookmarks] Add skeleton for MD Bookmarks.

chrome/app/bookmarks_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Bookmarks specific strings (included from generated_resources.grd). -->
 <grit-part>
   <!-- Begin of Bookmarks Bar strings-->
   <if expr="not is_android">
     <!-- The following two strings are shown when the user has no bookmarks yet. -->
     <message name="IDS_BOOKMARKS_NO_ITEMS" desc="Text shown when the user has no bookmarks">
       For quick access, place your bookmarks here on the bookmarks bar.
     </message>
     <message name="IDS_BOOKMARK_BAR_IMPORT_LINK" desc="text shown for importing ">
@@ skipping 302 matching lines @@
     </message>
     <message name="IDS_BOOKMARK_MANAGER_SEARCH" desc="In Title Case: The label for the tree item that shows the search results for the bookmarks.">
       Search
     </message>
   </if>
   <message name="IDS_EXPORT_BOOKMARKS_DEFAULT_FILENAME" desc="Filename that pre-populates the filename field when user attempts to export their bookmarks from Bookmark Manager.">
     bookmarks_<ph name="DATESTAMP">$1<ex>02_11_11</ex></ph>.html
   </message>
   <!-- End of Bookmarks Manager strings. -->
 
+  <!-- Begin of material design Bookmarks Manager strings. -->
+  <message name="IDS_MD_BOOKMARK_MANAGER_TITLE" desc="Title of the bookmark manager window.">
+    Bookmarks
+  </message>
+  <message name="IDS_MD_BOOKMARK_MANAGER_CLEAR_SEARCH" desc="Title of the button in the bookmark manager that stops a search.">
+    Clear search
+  </message>
+  <message name="IDS_MD_BOOKMARK_MANAGER_MENU_ADD_BOOKMARK" desc="Title of the bookmark toolbar dropdown menu item that adds a new bookmark.">
+    Add new bookmark
+  </message>
+  <message name="IDS_MD_BOOKMARK_MANAGER_MENU_ADD_FOLDER" desc="Title of the bookmark toolbar dropdown menu item that adds a new folder.">
+    Add new folder
+  </message>
+  <message name="IDS_MD_BOOKMARK_MANAGER_MENU_BULK_EDIT" desc="Title of the bookmark toolbar dropdown menu item that enters bulk edit mode.">
+    Bulk edit
+  </message>
+  <message name="IDS_MD_BOOKMARK_MANAGER_MENU_COPY_URL" desc="Title of the bookmark dropdown menu item that copies the url of the bookmark.">
+    Copy URL
+  </message>
+  <message name="IDS_MD_BOOKMARK_MANAGER_MENU_EXPORT" desc="Title of the bookmark toolbar dropdown menu item that exports bookmarks.">
+    Export Bookmarks
+  </message>
+  <message name="IDS_MD_BOOKMARK_MANAGER_MENU_IMPORT" desc="Title of the bookmark toolbar dropdown menu item that imports bookmarks.">
+    Import Bookmarks
+  </message>
+  <message name="IDS_MD_BOOKMARK_MANAGER_MENU_SORT" desc="Title of the bookmark toolbar dropdown menu item that sorts bookmarks by title.">
+    Sort by title
+  </message>
+  <!-- End of material design Bookmarks Manager strings. -->
+
   <!-- Begin of Bookmarks Menu (in the Main Menu) strings. -->
   <message name="IDS_BOOKMARKS_MENU" desc="The title of the Bookmarks menu in the Main menu and in the Mac menu bar.">
     &amp;Bookmarks
   </message>
   <if expr="not use_titlecase">
     <message name="IDS_BOOKMARK_THIS_PAGE" desc="Title of the menu item that bookmarks the current page.">
       Bookmark this page...
     </message>
   </if>
   <if expr="use_titlecase">
@@ skipping 13 matching lines @@
   </if>
   <!-- End of Bookmarks Menu (in the Main Menu) strings. -->
 
   <!-- Begin of Bookmark Star button strings. -->
   <message name="IDS_TOOLTIP_STARRED" desc="The tooltip shown when you hover the star button in the right side of the location bar and the current page is bookmarked.">
     Edit bookmark for this page
   </message>
   <!-- End of Bookmark Star button strings. -->
 
 </grit-part>