VideoPlayer: Use system header.

ui/file_manager/video_player/css/header.css

Index: ui/file_manager/video_player/css/header.css
diff --git a/ui/file_manager/video_player/css/header.css b/ui/file_manager/video_player/css/header.css
deleted file mode 100644
index 06c27b6d1d8d37744760aa7b063ad8ec5824b358..0000000000000000000000000000000000000000
--- a/ui/file_manager/video_player/css/header.css
+++ /dev/null
@@ -1,88 +0,0 @@
-/* Copyright 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. */
-
-#video-player > .header {
-  -webkit-app-region: drag;
-  background: rgba(30, 30, 30, 0.8);
-  border-bottom: 1px solid rgba(50, 50, 50, 0.8);
-  display: flex;
-  flex-direction: row;
-  height: 45px;
-  opacity: 1;
-  pointer-events: auto;
-  position: absolute;
-  top: 0;
-  width: 100%;
-  z-index: 200;
-}
-
-#video-player > .header > #title {
-  color: white;
-  flex-grow: 1;
-  font-size: 16px;
-  line-height: 45px;
-  overflow: hidden;
-  padding-left: 15px;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-}
-
-#video-player > .header > button,
-#video-player > .header > button[disabled] {
-  align-content: center;
-  background-color: rgba(0, 0, 0, 0);
-  background-position: center;
-  background-repeat: no-repeat;
-  border: none;
-  box-shadow: none;
-  color: white;
-  cursor: pointer;
-  padding: 1px;  /* Instead of a border. */
-  position: relative;
-  z-index: 10;
-}
-
-#video-player > .header > button {
-  height: 40px;
-  margin: 6px 0;
-  min-width: 40px;  /* Reset. */
-  width: 40px;
-}
-
-#video-player > .header > button:hover {
-  background-color: rgba(240, 240, 240, 1);
-}
-
-#video-player > .header > button:active,
-#video-player > .header > button[pressed],
-#video-player > .header > button[pressed]:hover {
-  color: black;
-}
-
-#video-player > .header > button {
-  -webkit-app-region: no-drag;
-  -webkit-margin-end: 10px;
-  cursor: default;
-  height: 32px;
-  min-width: 32px;
-  width: 32px;
-}
-
-#video-player > .header > button.minimize-button {
-  background-image: -webkit-image-set(
-      url(chrome://resources/images/apps/topbar_button_minimize.png) 1x,
-      url(chrome://resources/images/2x/apps/topbar_button_minimize.png) 2x);
-}
-
-#video-player > .header > button.maximize-button {
-  background-image: -webkit-image-set(
-      url(chrome://resources/images/apps/topbar_button_maximize.png) 1x,
-      url(chrome://resources/images/2x/apps/topbar_button_maximize.png) 2x);
-}
-
-#video-player > .header > button.close-button {
-  background-image: -webkit-image-set(
-      url(chrome://resources/images/apps/topbar_button_close.png) 1x,
-      url(chrome://resources/images/2x/apps/topbar_button_close.png) 2x);
-}