DevTools: Convert FilteredListWidget to use an optional provider

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/public/public_features.gni")
 import("//third_party/WebKit/Source/core/core.gni")
 
 all_devtools_files = [
   "front_end/accessibility/AccessibilityModel.js",
@@ skipping 499 matching lines @@
   "front_end/sources/callStackSidebarPane.css",
   "front_end/sources/CallStackSidebarPane.js",
   "front_end/sources/CSSSourceFrame.js",
   "front_end/sources/dialog.css",
   "front_end/sources/EditingLocationHistoryManager.js",
   "front_end/sources/eventListenerBreakpoints.css",
   "front_end/sources/EventListenerBreakpointsSidebarPane.js",
   "front_end/sources/fileBasedSearchResultsPane.css",
   "front_end/sources/FileBasedSearchResultsPane.js",
   "front_end/sources/FilePathScoreFunction.js",
-  "front_end/sources/FilteredUISourceCodeListDelegate.js",
+  "front_end/sources/FilteredUISourceCodeListProvider.js",
   "front_end/sources/InplaceFormatterEditorAction.js",
   "front_end/sources/JavaScriptBreakpointsSidebarPane.js",
   "front_end/sources/JavaScriptCompiler.js",
   "front_end/sources/JavaScriptOutlineDialog.js",
   "front_end/sources/JavaScriptSourceFrame.js",
   "front_end/sources/module.json",
   "front_end/sources/navigatorTree.css",
   "front_end/sources/navigatorView.css",
   "front_end/sources/NavigatorView.js",
   "front_end/sources/ObjectEventListenersSidebarPane.js",
@@ skipping 573 matching lines @@
     ".eslintrc.js",
     "devtools-node-modules/",
     "front_end/",
     "scripts/buildbot/run_eslint.py",
     "scripts/local_node/",
     "//testing/scripts/common.py",
     "//testing/scripts/run_devtools_check.py",
     "//testing/xvfb.py",
   ]
 }