Remove all code related to the PreRead field trial.

chrome/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/buildflag_header.gni")
 import("//build/config/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/features.gni")
 import("//build/config/locales.gni")
 import("//build/config/sanitizers/sanitizers.gni")
@@ skipping 154 matching lines @@
         "//chrome/chrome_watcher",
         "//chrome/chrome_watcher:client",
         "//chrome/common:constants",
         "//chrome/common:metrics_constants_util_win",
         "//chrome/install_static:install_static_util",
         "//chrome/installer/util:with_no_strings",
         "//chrome_elf",
         "//components/browser_watcher:browser_watcher_client",
         "//components/crash/content/app:run_as_crashpad_handler",
         "//components/flags_ui:switches",
-        "//components/startup_metric_utils/common",
         "//content:sandbox_helper_win",
         "//content/public/common:static_switches",
         "//crypto",
         "//sandbox",
         "//ui/gfx",
       ]
       data_deps = [
         "//chrome/app/version_assembly:version_assembly_manifest",
       ]
 
@@ skipping 1050 matching lines @@
     output = "$target_gen_dir/other_version.rc"
   }
 
   source_set("file_pre_reader") {
     sources = [
       "app/file_pre_reader_win.cc",
       "app/file_pre_reader_win.h",
     ]
     deps = [
       "//base",
-      "//components/startup_metric_utils/common",
     ]
   }
 }
 
 # GYP version: chrome/chrome_exe.gypi:visual_elements_resources
 copy("visual_elements_resources") {
   sources = [
     "//chrome/app/theme/$branding_path_component/win/tiles/Logo.png",
     "//chrome/app/theme/$branding_path_component/win/tiles/SmallLogo.png",
     "app/visual_elements_resources/chrome.VisualElementsManifest.xml",
@@ skipping 532 matching lines @@
       "//chrome/app/theme/$branding_path_component/product_logo_48.png",
       "//chrome/tools/build/linux/chrome-wrapper",
       "//third_party/xdg-utils/scripts/xdg-mime",
       "//third_party/xdg-utils/scripts/xdg-settings",
     ]
     outputs = [
       "$root_out_dir/{{source_file_part}}",
     ]
   }
 }