[DevTools] Migrate AuditsPanel away from SidebarTree.

third_party/WebKit/Source/devtools/front_end/audits/auditsPanel.css

 /*
  * Copyright (C) 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 11 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR 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.
  */
 
-.audits-sidebar-tree-item .icon {
-    content: url(Images/resourcesTimeGraphIcon.png);
-}
-
-.audit-result-sidebar-tree-item .icon {
-    content: url(Images/resourceDocumentIcon.png);
-}
-
 .audit-launcher-view .audit-launcher-view-content {
     padding: 0 0 0 16px;
     white-space: nowrap;
     display: -webkit-flex;
     text-align: left;
     -webkit-flex-direction: column;
     flex: auto;
 }
 
 .audit-launcher-view h1 {
@@ skipping 59 matching lines @@
 .audit-launcher-view .progress-indicator {
     display: inline-block;
 }
 
 .resource-url {
     float: right;
     text-align: right;
     max-width: 100%;
     margin-left: 4px;
 }