[DevTools] Migrate AuditsPanel away from SidebarTree.

third_party/WebKit/Source/devtools/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/features.gni")
 import("//third_party/WebKit/Source/core/core.gni")
 
 devtools_embedder_scripts = [
   "front_end/devtools.js",
   "front_end/Tests.js",
@@ skipping 341 matching lines @@
   "front_end/animation/animationTimeline.css",
   "front_end/animation/AnimationGroupPreviewUI.js",
   "front_end/animation/AnimationModel.js",
   "front_end/animation/AnimationScreenshotPopover.js",
   "front_end/animation/AnimationTimeline.js",
   "front_end/animation/AnimationUI.js",
 ]
 devtools_audits_js_files = [
   "front_end/audits/auditResultTree.css",
   "front_end/audits/auditsPanel.css",
+  "front_end/audits/auditsSidebarTree.css",
   "front_end/audits/AuditCategories.js",
   "front_end/audits/AuditCategory.js",
   "front_end/audits/AuditController.js",
   "front_end/audits/AuditExtensionCategory.js",
   "front_end/audits/AuditFormatters.js",
   "front_end/audits/AuditLauncherView.js",
   "front_end/audits/AuditResultView.js",
   "front_end/audits/AuditRules.js",
   "front_end/audits/AuditsPanel.js",
 ]
@@ skipping 744 matching lines @@
     deps = [
       ":frontend_protocol_sources",
       ":supported_css_properties",
     ]
     sources = generated_scripts
     outputs = [
       "$resources_out_debug_dir/{{source_file_part}}",
     ]
   }
 }