Remove all code related to the PreRead field trial.

chrome/browser/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/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 139 matching lines @@
     "//components/renderer_context_menu",
     "//components/search",
     "//components/search_engines",
     "//components/search_provider_logos",
     "//components/security_interstitials/core",
     "//components/security_state",
     "//components/signin/core/browser",
     "//components/ssl_errors",
     "//components/startup_metric_utils/browser:host",
     "//components/startup_metric_utils/browser:lib",
-
-    # TODO(fdoray): Remove this once the PreRead field trial has expired.
-    # crbug.com/577698
-    "//components/startup_metric_utils/common",
     "//components/strings",
     "//components/subresource_filter/core/browser",
     "//components/suggestions",
     "//components/supervised_user_error_page",
     "//components/sync",
     "//components/sync_bookmarks",
     "//components/sync_sessions",
     "//components/tracing:startup_tracing",
     "//components/translate/core/browser",
     "//components/translate/core/common",
@@ skipping 641 matching lines @@
       ":chrome_process_finder",
       "//chrome:file_pre_reader",
       "//chrome/chrome_watcher:client",
       "//chrome/common:metrics_constants_util_win",
       "//chrome/common:version_header",
       "//chrome_elf:blacklist",
       "//chrome_elf:constants",
       "//chrome_elf:dll_hash",
       "//components/browser_watcher",
       "//components/browser_watcher:browser_watcher_client",
-      "//components/startup_metric_utils/common",
       "//google_update",
       "//third_party/iaccessible2",
       "//third_party/isimpledom",
       "//third_party/wtl",
     ]
 
     all_dependent_configs = [ ":browser_win_linker_flags" ]
 
     if (!is_chrome_branded) {
       deps -= [ "//google_update" ]
@@ skipping 524 matching lines @@
   # linking all of the test support.
   static_library("pepper_cdm_test_constants") {
     testonly = true
     visibility = [ "//chrome/*" ]
     sources = [
       "media/pepper_cdm_test_constants.cc",
       "media/pepper_cdm_test_constants.h",
     ]
   }
 }