DevTools: migrate ComputedStyleWidget to shadow

third_party/WebKit/Source/devtools/front_end/elements/computedStyleWidgetTree.css

Index: third_party/WebKit/Source/devtools/front_end/elements/computedStyleWidgetTree.css
diff --git a/third_party/WebKit/Source/devtools/front_end/elements/computedStyleSidebarPane.css b/third_party/WebKit/Source/devtools/front_end/elements/computedStyleWidgetTree.css
similarity index 93%
copy from third_party/WebKit/Source/devtools/front_end/elements/computedStyleSidebarPane.css
copy to third_party/WebKit/Source/devtools/front_end/elements/computedStyleWidgetTree.css
index a04c7aafdbabb8c40aa702ae840db3e0d23fc9ea..f33a4aec023cca8939eef89da229ef9c65a50152 100644
--- a/third_party/WebKit/Source/devtools/front_end/elements/computedStyleSidebarPane.css
+++ b/third_party/WebKit/Source/devtools/front_end/elements/computedStyleWidgetTree.css
@@ -1,14 +1,9 @@
 /*
- * Copyright (c) 2015 The Chromium Authors. All rights reserved.
+ * Copyright (c) 2017 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.
  */
 
-.computed-properties {
-    -webkit-user-select: text;
-    flex-shrink: 0;
-}
-
 .computed-style-property {
     display: flex;
     overflow: hidden;