Replace "nested message loop" with "nested run loop" in comments.

chrome/browser/chrome_navigation_browsertest.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/command_line.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/renderer_context_menu/render_view_context_menu_test_util.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
@@ skipping 47 matching lines @@
 };
 
 // Helper class to track and allow waiting for navigation start events.
 class DidStartNavigationObserver : public content::WebContentsObserver {
  public:
   explicit DidStartNavigationObserver(content::WebContents* web_contents)
       : content::WebContentsObserver(web_contents),
         message_loop_runner_(new content::MessageLoopRunner) {}
   ~DidStartNavigationObserver() override {}
 
-  // Runs a nested message loop and blocks until the full load has
+  // Runs a nested run loop and blocks until the full load has
   // completed.
   void Wait() { message_loop_runner_->Run(); }
 
  private:
   // WebContentsObserver
   void DidStartNavigation(content::NavigationHandle* handle) override {
     if (message_loop_runner_->loop_running())
       message_loop_runner_->Quit();
   }
 
@@ skipping 350 matching lines @@
   // Let the navigation finish. It should commit successfully.
   manager.WaitForNavigationFinished();
   last_committed = web_contents->GetController().GetLastCommittedEntry();
   EXPECT_TRUE(last_committed);
   EXPECT_EQ(kURL2, last_committed->GetURL());
 
   EXPECT_TRUE(navigation_observer.has_committed());
   EXPECT_FALSE(navigation_observer.was_same_document());
   EXPECT_FALSE(navigation_observer.was_renderer_initiated());
 }