Revert of Convert more test helpers to base::RunLoop, fix page title checks.

content/test/content_browser_test_utils_internal.cc

Index: content/test/content_browser_test_utils_internal.cc
diff --git a/content/test/content_browser_test_utils_internal.cc b/content/test/content_browser_test_utils_internal.cc
index 4d9423057b83a7d01095fafc450eaf6042d02cb5..392439525ba2bc8451d4dc5720447e0382d6d94b 100644
--- a/content/test/content_browser_test_utils_internal.cc
+++ b/content/test/content_browser_test_utils_internal.cc
@@ -378,13 +378,15 @@
                                        ->delegate()
                                        ->GetAsWebContents()),
       frame_tree_node_id_(frame_tree_node->frame_tree_node_id()),
-      url_(url) {
+      url_(url),
+      message_loop_runner_(
+          new MessageLoopRunner(MessageLoopRunner::QuitMode::IMMEDIATE)) {
 }
 
 UrlCommitObserver::~UrlCommitObserver() {}
 
 void UrlCommitObserver::Wait() {
-  run_loop_.Run();
+  message_loop_runner_->Run();
 }
 
 void UrlCommitObserver::DidFinishNavigation(
@@ -393,7 +395,7 @@
       !navigation_handle->IsErrorPage() &&
       navigation_handle->GetURL() == url_ &&
       navigation_handle->GetFrameTreeNodeId() == frame_tree_node_id_) {
-    run_loop_.Quit();
+    message_loop_runner_->Quit();
   }
 }