Update Reading List icon

ios/chrome/browser/ui/reading_list/BUILD.gn

 # Copyright 2016 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.
 
 bundle_data("resources") {
   sources = [
     "resources/distillation_fail.png",
     "resources/distillation_fail@2x.png",
     "resources/distillation_fail@3x.png",
     "resources/distillation_success.png",
     "resources/distillation_success@2x.png",
     "resources/distillation_success@3x.png",
-    "resources/reading_list_icon.png",
-    "resources/reading_list_icon@2x.png",
-    "resources/reading_list_icon@3x.png",
+    "resources/reading_list_empty_state.png",
+    "resources/reading_list_empty_state@2x.png",
+    "resources/reading_list_empty_state@3x.png",
     "resources/reading_list_side_swipe.png",
     "resources/reading_list_side_swipe@2x.png",
     "resources/reading_list_side_swipe@3x.png",
   ]
   outputs = [
     "{{bundle_resources_dir}}/{{source_file_part}}",
   ]
 }
 
 source_set("reading_list") {
@@ skipping 98 matching lines @@
     "//ios/testing:ios_test_support",
     "//ios/third_party/earl_grey",
     "//ios/third_party/material_components_ios",
     "//ios/web:test_support",
   ]
   libs = [
     "UIKit.framework",
     "XCTest.framework",
   ]
 }