Add athena_strings.grd with athena specific strings

chrome/chrome_resources.gyp

 # Copyright (c) 2012 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.
 {
   'variables': {
     'grit_out_dir': '<(SHARED_INTERMEDIATE_DIR)/chrome',
     'about_credits_file': '<(SHARED_INTERMEDIATE_DIR)/about_credits.html',
     'additional_modules_list_file': '<(SHARED_INTERMEDIATE_DIR)/chrome/browser/internal/additional_modules_list.txt',
     'omnibox_mojom_file': '<(SHARED_INTERMEDIATE_DIR)/chrome/browser/ui/webui/omnibox/omnibox.mojom.js',
   },
@@ skipping 450 matching lines @@
         }],
         ['chromeos==1', {
           'dependencies': [
             '<(DEPTH)/ui/chromeos/ui_chromeos.gyp:ui_chromeos_resources',
             '<(DEPTH)/ui/chromeos/ui_chromeos.gyp:ui_chromeos_strings',
           ],
         }],
         ['use_athena==1', {
           'dependencies': [
             '<(DEPTH)/athena/resources/athena_resources.gyp:athena_resources',
+            '<(DEPTH)/athena/strings/athena_strings.gyp:athena_strings',
           ],
         }],
         ['enable_autofill_dialog==1 and OS!="android"', {
           'dependencies': [
             '<(DEPTH)/third_party/libaddressinput/libaddressinput.gyp:libaddressinput_strings',
           ],
         }],
         ['enable_extensions==1', {
           'dependencies': [
             '<(DEPTH)/device/bluetooth/bluetooth_strings.gyp:device_bluetooth_strings',
@@ skipping 95 matching lines @@
                      '<(generator_path)',
                      'credits',
                      '<(about_credits_file)',
           ],
           'message': 'Generating about:credits',
         },
       ],
     },
   ], # targets
 }