Merge to 2623 "[DevTools] Fix various bugs in 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;
     background-color: hsl(0, 0%, 98%);
 }
 
 .device-mode-toolbar {
     flex: none;
     background-color: hsl(0, 0%, 98%);
     border-bottom: 1px solid #ccc;
     display: flex;
     flex-direction: row;
     align-items: stretch;
 }
 
 .device-mode-toolbar .toolbar {
     overflow: hidden;
-    flex: none;
+    flex: 0 100000 auto;
     padding: 0 5px;
 }
 
+.device-mode-toolbar .toolbar.device-mode-toolbar-fixed-size {
+    flex: 0 1 auto;
+}
+
 .device-mode-toolbar-spacer {
     flex: 1 1 0;
     display: flex;
     flex-direction: row;
+    overflow: hidden;
 }
 
 .device-mode-content-clip {
     overflow: hidden;
     flex: auto;
 }
 
 .device-mode-media-container {
     flex: none;
     overflow: hidden;
@@ skipping 83 matching lines @@
     top: 0;
     width: 100%;
     height: 100%;
 }
 
 .device-mode-resizer {
     position: absolute;
     display: flex;
     align-items: center;
     justify-content: center;
+    overflow: hidden;
     transition: background-color 0.1s ease;
 }
 
 .device-mode-resizer:hover {
     background-color: hsla(0, 0%, 0%, 0.1);
 }
 
 .device-mode-resizer > div {
     pointer-events: none;
 }
@@ skipping 134 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);
 }