Use bookmark manager to add/edit bookmark pages with webui_dialogs=1.

chrome/chrome_browser.gypi

 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'dependencies': [
@@ skipping 3873 matching lines @@
           ],
           'include_dirs': [
             '../third_party/angle/include',
           ],
           'link_settings': {
             'libraries': [
               '-lXcomposite',
             ],
           },
         }],
+        ['webui_bookmark_editor==1', {
+          'defines': [
+            'WEBUI_BOOKMARK_EDITOR',
+          ],
+        }],
         ['webui_certificate_viewer==0', {
           'sources/': [
             ['exclude', '^browser/ui/webui/certificate_viewer.cc'],
             ['exclude', '^browser/ui/webui/certificate_viewer.h'],
             ['exclude', '^browser/ui/webui/certificate_viewer_ui.cc'],
             ['exclude', '^browser/ui/webui/certificate_viewer_ui.h'],
           ],
         }],
         ['webui_certificate_viewer==1', {
           'sources/': [
@@ skipping 992 matching lines @@
       ],
       'export_dependent_settings': [
         'in_memory_url_index_cache_proto',
       ],
       # This target exports a hard dependency because it includes generated
       # header files.
       'hard_dependency': 1,
     },
   ],
 }