Convert more test helpers to base::RunLoop, fix page title checks. (Reland)

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 f129a9d6be071ba3363776ecfca81f73af6a1771..1f0ac7bb4d8974e236fed4677b747e0d113f21af 100644
--- a/content/test/content_browser_test_utils_internal.cc
+++ b/content/test/content_browser_test_utils_internal.cc
@@ -379,15 +379,13 @@ UrlCommitObserver::UrlCommitObserver(FrameTreeNode* frame_tree_node,
                                        ->delegate()
                                        ->GetAsWebContents()),
       frame_tree_node_id_(frame_tree_node->frame_tree_node_id()),
-      url_(url),
-      message_loop_runner_(
-          new MessageLoopRunner(MessageLoopRunner::QuitMode::IMMEDIATE)) {
+      url_(url) {
 }
 
 UrlCommitObserver::~UrlCommitObserver() {}
 
 void UrlCommitObserver::Wait() {
-  message_loop_runner_->Run();
+  run_loop_.Run();
 }
 
 void UrlCommitObserver::DidFinishNavigation(
@@ -396,7 +394,7 @@ void UrlCommitObserver::DidFinishNavigation(
       !navigation_handle->IsErrorPage() &&
       navigation_handle->GetURL() == url_ &&
       navigation_handle->GetFrameTreeNodeId() == frame_tree_node_id_) {
-    message_loop_runner_->Quit();
+    run_loop_.Quit();
   }
 }