DevTools: Fix toolbar layout glitches on memory panel

third_party/WebKit/Source/devtools/front_end/profiler/profilesPanel.css

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2009 Anthony Ricaud <rik@webkit.org>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 49 matching lines @@
     display: inline-block;
 }
 
 .profile-view .data-grid tr.selected span {
     color: inherit;
 }
 
 .profiles-toolbar {
     background-color: #f3f3f3;
     border-bottom: 1px solid #ccc;
+    flex-shrink: 0;
+}
+
+.profiles-tree-sidebar {
+    flex: auto;
+    overflow: hidden;
 }
 
 .profiles-sidebar-tree-box {
-    flex: auto;
+    overflow-y: auto;
 }
 
 .profile-view {
     display: flex;
     overflow: hidden;
 }
 
 .profile-view .data-grid {
     border: none;
     flex: auto;
@@ skipping 126 matching lines @@
     bottom: 0;
 }
 
 #cpu-profile-flame-chart-overview-grid .resources-dividers-label-bar {
     pointer-events: auto;
 }
 
 .cpu-profile-flame-chart-overview-pane {
     flex: 0 0 80px !important;
 }