Web shell test to go back and forward.

ios/web/ios_web_shell_tests.gyp

 # Copyright 2016 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,
   },
   'conditions': [
     # The iOS frameworks being built for ios_web_shell_test require certs which
     # bots do not currently have installed.  Ninja allows this, Xcode does not.
     ['"<(GENERATOR)"=="ninja" or "<(GENERATOR_FLAVOR)"=="ninja"', {
       'targets': [
         {
           'variables': {
             'test_host': 'ios_web_shell.app/ios_web_shell',
             'test_host_name': 'ios_web_shell',
           },
           'target_name': 'ios_web_shell_test',
           'type': 'loadable_module',
           'mac_xctest_bundle': 1,
           'dependencies': [
             '../third_party/earl_grey/earl_grey.gyp:EarlGrey',
             'ios_web_shell.gyp:ios_web_shell',
+            'ios_web.gyp:ios_web_test_support',
           ],
           'sources': [
+            'public/test/http_server_util.h',
+            'public/test/http_server_util.mm',
+            'shell/test/navigation_test_util.h',
+            'shell/test/navigation_test_util.mm',
+            'shell/test/shell_matchers.h',
+            'shell/test/shell_matchers.mm',
             'shell/test/web_shell_navigation_egtest.mm',
+            'shell/test/web_shell_test_util.h',
+            'shell/test/web_shell_test_util.mm',
+            'shell/test/web_view_matchers.h',
+            'shell/test/web_view_matchers.mm',
           ],
           'xcode_settings': {
             'WRAPPER_EXTENSION': 'xctest',
             'TEST_HOST': '$(CONFIGURATION_BUILD_DIR)/<(test_host)',
             'BUNDLE_LOADER': '$(TEST_HOST)',
             'conditions':[
               ['"<(GENERATOR)"!="xcode" or "<(GENERATOR_FLAVOR)"=="ninja"', {
                 'OTHER_LDFLAGS': [
                   '-bundle_loader <@(test_host)',
                 ],
@@ skipping 27 matching lines @@
           # The iOS frameworks being built for ios_web_shell_test require certs
           # which bot do not currently have installed.  Ninja allows this, Xcode
           # does not.
           'target_name': 'ios_web_shell_test',
           'type': 'none',
         },
       ],
     }],
   ],
 }