Store and load icudtl.dat directly from the apk rather than extracting on start-up

build/config/android/rules.gni

 # 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("//base/android/linker/config.gni")
 import("//build/config/android/config.gni")
 import("//build/config/android/internal_rules.gni")
 import("//tools/grit/grit_rule.gni")
 import("//tools/relocation_packer/config.gni")
 
@@ skipping 1499 matching lines @@
   create_apk("${_template_name}__create") {
     apk_path = _final_apk_path
     android_manifest = _android_manifest
     resources_zip = _all_resources_zip_path
     dex_path = final_dex_path
     load_library_from_apk = _load_library_from_apk
     create_density_splits = _create_density_splits
     if (defined(invoker.extensions_to_not_compress)) {
       extensions_to_not_compress = invoker.extensions_to_not_compress
     } else {
-      # Allow v8 snapshots to be loaded directly from the .apk.
-      extensions_to_not_compress = "bin"
+      # Allow v8 snapshots and icu data to be loaded directly from the .apk.
+      extensions_to_not_compress = "bin,dat"
     }
 
     version_code = _version_code
     version_name = _version_name
 
     keystore_name = _keystore_name
     keystore_path = _keystore_path
     keystore_password = _keystore_password
 
     # This target generates the input file _all_resources_zip_path.
@@ skipping 364 matching lines @@
 template("uiautomator_test") {
   set_sources_assignment_filter([])
   if (defined(invoker.testonly)) {
     testonly = invoker.testonly
   }
   assert(target_name != "")
   assert(invoker.deps != [] || true)
   group(target_name) {
   }
 }