[ios Mojo] Integration test for Mojo WebUI.

ios/web/test/web_test_suite.mm

Index: ios/web/test/web_test_suite.mm
diff --git a/ios/web/test/web_test_suite.mm b/ios/web/test/web_test_suite.mm
index e167e98f9ef66916f9ec61b90b4f983bfc4c514c..eb6f444e4a13c9b5474ab5ee42dbc1c87d12ab91 100644
--- a/ios/web/test/web_test_suite.mm
+++ b/ios/web/test/web_test_suite.mm
@@ -7,10 +7,12 @@
 #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 {
 
@@ -43,6 +45,17 @@ void WebTestSuite::Initialize() {
       new WebTestSuiteListener);
 
   RegisterWebSchemes(false);
+
+  // Force unittests to run using en-US so if testing string output will work
+  // regardless of the system language.
+  ui::ResourceBundle::InitSharedInstanceWithLocale(
+      "en-US", nullptr, ui::ResourceBundle::LOAD_COMMON_RESOURCES);
+  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"));
+  ResourceBundle::GetSharedInstance().AddDataPackFromPath(
+      resources_pack_path, ui::SCALE_FACTOR_NONE);
 }
 
 }  // namespace web