[ios Mojo] Integration test for Mojo WebUI.

ios/web/test/web_test_suite.mm

 // 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.
 
 #include "ios/web/test/web_test_suite.h"
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/statistics_recorder.h"
+#include "base/path_service.h"
 #import "ios/web/public/test/test_web_client.h"
 #include "ios/web/public/url_schemes.h"
 #include "ios/web/web_thread_impl.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "ui/base/resource/resource_bundle.h"
 
 namespace web {
 
 class WebTestSuiteListener : public testing::EmptyTestEventListener {
  public:
   WebTestSuiteListener() {}
   void OnTestEnd(const testing::TestInfo& test_info) override {
     WebThreadImpl::FlushThreadPoolHelperForTesting();
   }
 
@@ skipping 12 matching lines @@
 
   // Initialize the histograms subsystem, so that any histograms hit in tests
   // are correctly registered with the statistics recorder and can be queried
   // by tests.
   base::StatisticsRecorder::Initialize();
 
   testing::UnitTest::GetInstance()->listeners().Append(
       new WebTestSuiteListener);
 
   RegisterWebSchemes(false);
+
+  // Load test resources if they are present in the bundle.

[stkhapugin, 2016/06/01 09:47:40]

This code should be: 

  // Force unittests to run using en-US so if we test against string
  // output, it'll pass regardless of the system language.
  ui::ResourceBundle::InitSharedInstanceWithLocale(
      "en-US", nullptr, ui::ResourceBundle::LOAD_COMMON_RESOURCES);
  base::FilePath resources_pack_path;
  PathService::Get(ios::FILE_RESOURCES_PACK, &resources_pack_path);
  ResourceBundle::GetSharedInstance().AddDataPackFromPath(
      resources_pack_path, ui::SCALE_FACTOR_NONE);

because this code doesn't force locale to en-US and it should not use literal
but should use PathService to get the name of the resource pack to load. 

+  base::FilePath resources_pack_path;
+  base::PathService::Get(base::DIR_MODULE, &resources_pack_path);
+  resources_pack_path =
+      resources_pack_path.Append(FILE_PATH_LITERAL("resources.pak"));
+  ui::ResourceBundle::InitSharedInstanceWithPakPath(resources_pack_path);
 }
 
 }  // namespace web