Use a TestBrowserThreadBundle in WebUIDataSourceTest

content/browser/webui/web_ui_data_source_unittest.cc

Index: content/browser/webui/web_ui_data_source_unittest.cc
diff --git a/content/browser/webui/web_ui_data_source_unittest.cc b/content/browser/webui/web_ui_data_source_unittest.cc
index 97fa85ec82f533691ab66c696ceccc4032ec4ee4..ddf253bfee71f4aed6b9ac1223f3260b00981616 100644
--- a/content/browser/webui/web_ui_data_source_unittest.cc
+++ b/content/browser/webui/web_ui_data_source_unittest.cc
@@ -6,6 +6,7 @@
 #include "base/memory/ref_counted_memory.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/webui/web_ui_data_source_impl.h"
+#include "content/public/test/test_browser_thread_bundle.h"
 #include "content/test/test_content_client.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -83,6 +84,7 @@ class WebUIDataSourceTest : public testing::Test {
     result_data_ = data;
   }
 
+  TestBrowserThreadBundle thread_bundle_;
   scoped_refptr<WebUIDataSourceImpl> source_;
   TestClient client_;
 };