Move web modal dialog manager files into the constrained_window component.

components/web_modal.gypi

 # Copyright (c) 2013 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': [
     {
       # GN version: //components/web_modal
       'target_name': 'web_modal',
       'type': 'static_library',
       'include_dirs': [
         '..',
       ],
       'dependencies': [
         '../base/base.gyp:base',
         '../content/content.gyp:content_browser',
         '../skia/skia.gyp:skia',
       ],
+      'export_dependent_settings': [
+        # Skia headers are exposed in the public API.
+        '../skia/skia.gyp:skia',
+      ],
       'sources': [
         # Note: sources list duplicated in GN build.
         'web_modal/modal_dialog_host.cc',
         'web_modal/modal_dialog_host.h',
         'web_modal/single_web_contents_dialog_manager.h',
         'web_modal/web_contents_modal_dialog_host.cc',
         'web_modal/web_contents_modal_dialog_host.h',
         'web_modal/web_contents_modal_dialog_manager.cc',
         'web_modal/web_contents_modal_dialog_manager.h',
         'web_modal/web_contents_modal_dialog_manager_delegate.cc',
@@ skipping 10 matching lines @@
       'sources': [
         # Note: sources list duplicated in GN build.
         'web_modal/test_web_contents_modal_dialog_host.cc',
         'web_modal/test_web_contents_modal_dialog_host.h',
         'web_modal/test_web_contents_modal_dialog_manager_delegate.cc',
         'web_modal/test_web_contents_modal_dialog_manager_delegate.h',
       ],
     },
   ],
 }