[DevTools] Make WebView boxes in chrome://inspect unshrinkable

chrome/browser/resources/inspect/inspect.css

 /*
  * 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.
  */
 
 body {
   color: rgb(48, 57, 66);
   font-family: Arial, sans-serif;
   font-size: 13px;
@@ skipping 163 matching lines @@
   display: flex;
   flex-flow: row wrap;
 }
 
 .subrow > div {
   margin-right: 0.5em;
 }
 
 .webview-thumbnail {
   display: inline-block;
+  flex-shrink: 0;
   margin-right: 5px;
   overflow: hidden;
   position: relative;
   vertical-align: top;
 }
 
 .screen-rect {
   background-color: #eee;
   position: absolute;
 }
@@ skipping 201 matching lines @@
 }
 
 #port-forwarding-config-buttons {
   align-items: center;
   display: flex;
 }
 
 #port-forwarding-config-buttons > label {
   flex-grow: 1
 }