Eliminate silently letting errors pass on pak loading.

ui/base/ui_base_tests_bundle.gypi

 # 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.
 
 # This file contains resources for the ui_unittests test bundle.
 # See chrome_dll_bundle.gypi for a description of the techniques here.
 {
   'product_name': 'ui_unittests Framework',
   'variables': {
     # There is no executable in the mock framework, and so nothing to strip.
@@ skipping 22 matching lines @@
   'postbuilds': [
     {
       'postbuild_name': 'Symlink Resources',
       'action': [
         'ln',
         '-fns',
         'Versions/A/Resources',
         '${BUILT_PRODUCTS_DIR}/${WRAPPER_NAME}/Resources'
       ],
     },
+    # The Mac resource bundle code hard-codes the names of the 100% and 200%
+    # paks. This symlinking allows ui_test.pak to stand in for them.
     {
-      # Resource bundle pak names are hardcoded. This allows ui_test.pak to be
-      # found while running the ResourceBundle tests.
       'postbuild_name': 'Symlink chrome_100_percent for test',
       'action': [
         'ln',
         '-fns',
         'ui_test.pak',
         '${BUILT_PRODUCTS_DIR}/${WRAPPER_NAME}/Versions/A/Resources/chrome_100_percent.pak'
       ],
     },
+    {
+      'postbuild_name': 'Symlink chrome_200_percent for test',
+      'action': [
+        'ln',
+        '-fns',
+        'ui_test.pak',
+        '${BUILT_PRODUCTS_DIR}/${WRAPPER_NAME}/Versions/A/Resources/chrome_200_percent.pak'
+      ],
+    },
   ],
 }