Fix uses of /deep/ in trace viewer.

tracing/tracing/ui/base/list_view.css

Index: tracing/tracing/ui/base/list_view.css
diff --git a/tracing/tracing/ui/base/list_view.css b/tracing/tracing/ui/base/list_view.css
deleted file mode 100644
index 0a9ef18ed6730dfc8e447828e194b6675f53f44f..0000000000000000000000000000000000000000
--- a/tracing/tracing/ui/base/list_view.css
+++ /dev/null
@@ -1,30 +0,0 @@
-/* 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.
- */
-
-* /deep/ .x-list-view {
-  -webkit-user-select: none;
-  display: block;
-}
-* /deep/ .x-list-view:focus {
-  outline: none;
-}
-
-* /deep/ .x-list-view * {
-  -webkit-user-select: none;
-}
-
-* /deep/ .x-list-view > .list-item {
-  padding: 2px 4px 2px 4px;
-}
-
-* /deep/ .x-list-view:focus > .list-item[selected] {
-  background-color: rgb(171, 217, 202);
-  outline: 1px dotted rgba(0,0,0,0.1);
-  outline-offset: 0;
-}
-
-* /deep/ .x-list-view > .list-item[selected] {
-  background-color: rgb(103, 199, 165);
-}