Fix en_GB's language name failure

scripts/trim_data.sh

 #!/bin/bash
 # Copyright (c) 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.
 
 
 # Remove display names for languages that are not listed in the accept-language
 # list of Chromium.
 function filter_display_language_names {
   for lang in $(grep -v '^#' accept_lang.list)
@@ skipping 12 matching lines @@
     sed -r -i \
     '/^    Keys\{$/,/^    \}$/d
      /^    Languages\{$/, /^    \}$/ {
        /^    Languages\{$/p
        /^        '${ACCEPT_LANG_PATTERN}'/p
        /^    \}$/p
        d
      }
      /^    Types\{$/,/^    \}$/d
      /^    Variants\{$/,/^    \}$/d' ${target}
+
+    # Delete an empty "Languages" block. Otherwise, getting the display
+    # name for all the language in a given locale (e.g. en_GB) would fail
+    # when the above filtering sed command results in an empty "Languages"
+    # block.
+    sed -r -i \
+    '/^    Languages\{$/ {
+       N
+       /^    Languages\{\n    \}/ d
+     }' ${target}
   done
 }
 
 
 # Keep only the minimum locale data for non-UI languages.
 function abridge_locale_data_for_non_ui_languages {
   for lang in $(grep -v '^#' chrome_ui_languages.list)
   do
     # Set $OP to '|' only if $UI_LANGUAGES is not empty.
     OP=${UI_LANGUAGES:+|}
@@ skipping 138 matching lines @@
 filter_currency_data
 filter_region_data
 remove_legacy_chinese_codepoint_collation
 filter_unit_data
 
 # Chromium OS needs exemplar cities for timezones, but not Chromium.
 # It'll save 400kB (uncompressed), but the size difference in
 # 7z compressed installer is <= 100kB.
 # TODO(jshin): Make separate data files for CrOS and Chromium.
 #remove_exemplar_cities