Convert asynchronous closure test in cr.ui framework to a browser test.

chrome/test/data/webui/webui_resource_browsertest.cc

Index: chrome/test/data/webui/webui_resource_browsertest.cc
diff --git a/chrome/test/data/webui/webui_resource_browsertest.cc b/chrome/test/data/webui/webui_resource_browsertest.cc
index ef11f858e80e0996b828bf98d0ca3471efcdf964..b233ec3ee46c3f516a972327c9d8139c51a3f915 100644
--- a/chrome/test/data/webui/webui_resource_browsertest.cc
+++ b/chrome/test/data/webui/webui_resource_browsertest.cc
@@ -44,6 +44,9 @@ class WebUIResourceBrowserTest : public InProcessBrowserTest {
     std::string message;
     ExecuteJavascriptOnCurrentTab("runTests()");
     ASSERT_TRUE(message_queue.WaitForMessage(&message));
+    while (message.compare("\"PENDING\"") == 0) {
+      ASSERT_TRUE(message_queue.WaitForMessage(&message));
+    }
     EXPECT_STREQ("\"SUCCESS\"", message.c_str());
   }
 
@@ -112,6 +115,11 @@ IN_PROC_BROWSER_TEST_F(WebUIResourceBrowserTest, LocalStringsTest) {
   RunTest(base::FilePath(FILE_PATH_LITERAL("local_strings_test.html")));
 }
 
+IN_PROC_BROWSER_TEST_F(WebUIResourceBrowserTest, ParseHtmlSubsetTest) {
+  AddLibrary(IDR_WEBUI_JS_PARSE_HTML_SUBSET);
+  RunTest(base::FilePath(FILE_PATH_LITERAL("parse_html_subset_test.html")));
+}
+
 IN_PROC_BROWSER_TEST_F(WebUIResourceBrowserTest, PositionUtilTest) {
   AddLibrary(IDR_WEBUI_JS_CR);
   AddLibrary(IDR_WEBUI_JS_CR_UI_POSITION_UTIL);