Devtools: Add device frames to device mode

third_party/WebKit/Source/devtools/front_end/emulation/deviceModeView.css

 /*
  * Copyright 2015 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.
  */
 
 :host {
     overflow: hidden;
     align-items: stretch;
     flex: auto;
@@ skipping 115 matching lines @@
 }
 
 .device-mode-screen-image {
     position: absolute;
     left: 0;
     top: 0;
     width: 100%;
     height: 100%;
 }
 
+.device-mode-outline-image:not(.hidden) + .device-mode-screen-area {
+    box-shadow: none;
+}
+
 .device-mode-resizer {
     position: absolute;
     display: flex;
     align-items: center;
     justify-content: center;
     overflow: hidden;
     transition: background-color 0.1s ease, opacity 0.1s ease;
 }
 
 .device-mode-resizer:hover {
@@ skipping 113 matching lines @@
     background-color: #fcfcfc;
 }
 
 .device-mode-ruler {
     pointer-events: none;
     position: relative;
 }
 
 .device-mode-ruler-top {
     flex: 0 0 20px;
+    z-index: 1;
 }
 
 .device-mode-ruler-left {
     position: absolute;
     left: 0;
     width: 20px;
     top: 0;
     bottom: 0;
     transform: translateX(-20px);
 }
@@ skipping 48 matching lines @@
 .device-mode-ruler-top .device-mode-ruler-text {
     left: 2px;
     top: -2px;
 }
 
 .device-mode-ruler-left .device-mode-ruler-text {
     left: -4px;
     top: -15px;
     transform: rotate(270deg);
 }