DevTools: migrate sidebar pane's titleElement to use Toolbar.

Source/devtools/front_end/components/breakpointsList.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.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
  *     documentation and/or other materials provided with the distribution.
  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
  *     its contributors may be used to endorse or promote products derived
  *     from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-.sidebar-pane > .body .breakpoint-condition {
+.sidebar-pane .breakpoint-condition {
     display: block;
     margin-top: 4px;
     margin-bottom: 4px;
     margin-left: 23px;
     margin-right: 8px;
 }
 
 .breakpoint-list .editing.being-edited {
     overflow: hidden;
     white-space: nowrap;
@@ skipping 20 matching lines @@
 }
 
 .breakpoint-list li {
     white-space: nowrap;
     text-overflow: ellipsis;
     overflow: hidden;
     padding: 2px 0;
 }
 
 .breakpoint-list li:hover {
-    background-color: rgba(56, 121, 217, 0.2);
-}
-
-.breakpoint-list .checkbox-elem {
-    margin: 0 4px;
-    vertical-align: top;
-    position: relative;
-    z-index: 1;
-    top: 3px;
+    background-color: #eee;
 }
 
 .breakpoint-list .source-text {
     white-space: nowrap;
     text-overflow: ellipsis;
     overflow: hidden;
     margin: 2px 0 0 20px;
 }
 
 .sidebar-pane .breakpoint-hit {
@@ skipping 23 matching lines @@
     -webkit-padding-start: 12px;
     list-style: none;
 }
 
 .event-listener-breakpoints ol.expanded {
     display: block;
 }
 
 .event-listener-breakpoints li {
     margin-left: 12px;
-    white-space: nowrap;
     text-overflow: ellipsis;
-    overflow: hidden;
     -webkit-user-select: text;
     cursor: default;
-    padding-top: 2px;
-    line-height: 12px;
 }
 
 .event-listener-breakpoints li.parent {
     margin-left: 1px;
 }
 
 .event-listener-breakpoints li.parent::before {
     -webkit-user-select: none;
     background-image: url(Images/toolbarButtonGlyphs.png);
     background-size: 352px 144px;
     opacity: 0.5;
     content: "a";
     width: 8px;
     float: left;
-    margin-right: 4px;
+    margin: 2px 2px 0 -2px;
     color: transparent;
     text-shadow: none;
 }
 
 @media (-webkit-min-device-pixel-ratio: 1.5) {
 .event-listener-breakpoints li.parent::before {
     background-image: url(Images/toolbarButtonGlyphs_2x.png);
 }
 } /* media */
 
 .event-listener-breakpoints li.parent::before {
     background-position: -4px -96px;
 }
 
 .event-listener-breakpoints li.parent.expanded::before {
     background-position: -20px -96px;
 }
 
 .event-listener-breakpoints .children li {
     margin-left: 12px;
-    height: 16px;
-}
-
-.event-listener-breakpoints .checkbox-elem {
-    font-size: 10px;
 }
 
 .async-operations li > label {
     float: left;
 }
 
 .async-operations li > div {
     float: right;
     margin: 2px 3px 0 2px;
 }