Fix uses of /deep/ in trace viewer.

tracing/tracing/ui/extras/chrome/cc/layer_view.css

Index: tracing/tracing/ui/extras/chrome/cc/layer_view.css
diff --git a/tracing/tracing/ui/extras/chrome/cc/layer_view.css b/tracing/tracing/ui/extras/chrome/cc/layer_view.css
deleted file mode 100644
index c171beb9c51b7a757edf9f93ed96b460df1943f5..0000000000000000000000000000000000000000
--- a/tracing/tracing/ui/extras/chrome/cc/layer_view.css
+++ /dev/null
@@ -1,31 +0,0 @@
-/* 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.
- */
-
-* /deep/ tr-ui-e-chrome-cc-layer-view {
-  flex-direction: column;
-  display:  flex;
-  left: 0;
-  position: relative;
-  top: 0;
-}
-
-* /deep/ tr-ui-e-chrome-cc-layer-view >
-      tr-ui-e-chrome-cc-layer-tree-quad-stack-view {
-  flex: 1 1 100%;
-  flex-direction: column;
-  min-height: 0;
-  display: flex;
-  width: 100%;
-}
-
-* /deep/tr-ui-e-chrome-cc- layer-view > tr-ui-e-chrome-cc-layer-view-analysis {
-  height: 150px; /* fixed height given by drag control */
-  overflow-y: auto;
-}
-
-* /deep/ tr-ui-e-chrome-cc-layer-view >
-      tr-ui-e-chrome-cc-layer-view-analysis * {
-  -webkit-user-select: text;
-}