Remove some platform specific stuff from views.

ui/file_manager/file_manager/foreground/css/share_dialog.css

Index: ui/file_manager/file_manager/foreground/css/share_dialog.css
diff --git a/ui/file_manager/file_manager/foreground/css/share_dialog.css b/ui/file_manager/file_manager/foreground/css/share_dialog.css
deleted file mode 100644
index 14338b2a3765bc2d9f9122326962f530f83232c4..0000000000000000000000000000000000000000
--- a/ui/file_manager/file_manager/foreground/css/share_dialog.css
+++ /dev/null
@@ -1,35 +0,0 @@
-/* Copyright (c) 2014 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. */
-
-.cr-dialog-frame.share-dialog-frame {
-  -webkit-app-region: no-drag;
-  background-color: white;
-  width: auto;
-}
-
-.share-dialog-webview-wrapper {
-  height: 100px;
-  margin-top: 10px;
-  min-width: 300px;
-  overflow: hidden;
-  transition: height 200ms ease-out;
-}
-
-.share-dialog-webview-wrapper:not(.loaded) {
-  background: url(../images/common/spinner.svg) center/16px no-repeat;
-}
-
-.share-dialog-webview {
-  height: 100%;
-  width: 100%;
-}
-
-.share-dialog-webview-wrapper:not(.loaded) .share-dialog-webview {
-  visibility: hidden;
-}
-
-.share-dialog-frame .cr-dialog-text,
-.share-dialog-frame .cr-dialog-buttons {
-  display: none;
-}