Add support for decoding WebP images

ios/ios_tests_unit.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_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',
         'ios_base.gyp:ios_consumer_base',
         'web/ios_web.gyp:ios_web',
         'web/ios_web.gyp:test_support_ios_web',
       ],
       'sources': [
         'web/browser_state_unittest.cc',
         'web/navigation/navigation_item_impl_unittest.mm',
+        'web/public/webp_decoder_unittest.mm',
         'web/string_util_unittest.cc',
       ],
+      'actions': [
+        {
+          'action_name': 'copy_test_data',
+          'variables': {
+            'test_data_files': [
+              'web/test/data/test.jpg',
+              'web/test/data/test.webp',
+              'web/test/data/test_alpha.webp',
+              'web/test/data/test_alpha.png',
+              'web/test/data/test_small.tiff',
+              'web/test/data/test_small.webp',
+            ],
+            'test_data_prefix': 'ios',
+          },
+          'includes': [ '../build/copy_test_data_ios.gypi' ],
+        },
+      ],
     },
   ],
 }