Create top-level ios/public/ directory.

ios/ios_consumer.gyp

 # Copyright 2013 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': {
     'chromium_code': 1,
    },
   'targets': [
     {
       'target_name': 'ios_consumer_base',
       'type': 'static_library',
       'dependencies': [
-        '../../base/base.gyp:base',
+        '../base/base.gyp:base',
       ],
       'include_dirs': [
-        '../..',
+        '..',
       ],
       'sources': [
-        'base/supports_user_data.cc',
-        'base/util.mm',
-        'public/base/supports_user_data.h',
-        'public/base/util.h',
+        'consumer/base/supports_user_data.cc',
+        'consumer/base/util.mm',
+        'public/consumer/base/supports_user_data.h',
+        'public/consumer/base/util.h',
       ],
     },
     {
       'target_name': 'ios_consumer_unittests',
       'type': '<(gtest_target_type)',
       'dependencies': [
-        '../../base/base.gyp:base',
-        '../../base/base.gyp:run_all_unittests',
-        '../../base/base.gyp:test_support_base',
-        '../../testing/gmock.gyp:gmock',
-        '../../testing/gtest.gyp:gtest',
+        '../base/base.gyp:base',
+        '../base/base.gyp:run_all_unittests',
+        '../base/base.gyp:test_support_base',
+        '../testing/gmock.gyp:gmock',
+        '../testing/gtest.gyp:gtest',
         'ios_consumer_base',
       ],
       'sources': [
-        'base/supports_user_data_unittest.cc',
+        'consumer/base/supports_user_data_unittest.cc',
       ],
     },
   ],
 }