Move the web dialogs code to src/ui/web_dialogs from src/chrome

ui/web_dialogs/web_dialogs.gyp

+# Copyright (c) 2012 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.
+
+{
+  'variables': {
+    'chromium_code': 1,
+  },
+  'targets': [
+    {
+      'target_name': 'web_dialogs',
+      'type': '<(component)',
+      'dependencies': [
+        '../../base/base.gyp:base',
+        '../../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
+        '../../content/content.gyp:content_browser',
+        '../../skia/skia.gyp:skia',
+      ],
+      'defines': [
+        'WEB_DIALOGS_IMPLEMENTATION',
+      ],
+      'sources': [
+        # All .cc, .h under web_dialogs, except unittests.
+        'constrained_web_dialog_ui.cc',
+        'constrained_web_dialog_ui.h',
+        'web_dialog_delegate.cc',
+        'web_dialog_delegate.h',
+        'web_dialog_observer.h',
+        'web_dialog_ui.cc',
+        'web_dialog_ui.h',
+        'web_dialogs_export.h',
+      ],
+    },
+  ],
+}