Remove all code related to the PreRead field trial.

chrome/BUILD.gn

Index: chrome/BUILD.gn
diff --git a/chrome/BUILD.gn b/chrome/BUILD.gn
index 126887229c3b3c3a99418096026516db9254c2cd..0534fd03c7f9da88b387c1e27819eb9831120f21 100644
--- a/chrome/BUILD.gn
+++ b/chrome/BUILD.gn
@@ -173,7 +173,6 @@ if (!is_android && !is_mac) {
         "//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",
@@ -853,8 +852,8 @@ if (is_win) {
     # corresponding Widevine targets based on branding.
     bundle_data("widevine_cdm_library_binaries") {
       sources = [
-        "$root_out_dir/libwidevinecdm.dylib",
         "$root_out_dir/$widevine_cdm_path/widevinecdmadapter.plugin",
+        "$root_out_dir/libwidevinecdm.dylib",
       ]
       outputs = [
         "{{bundle_root_dir}}/Libraries/$widevine_cdm_path/{{source_file_part}}",
@@ -1261,7 +1260,6 @@ if (is_win) {
     ]
     deps = [
       "//base",
-      "//components/startup_metric_utils/common",
     ]
   }
 }