Revert of Add thread checking to RunLoop, deprecate MessageLoopRunner.

content/browser/loader/async_revalidation_manager_browsertest.cc

 // Copyright 2015 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 <memory>
 #include <string>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 72 matching lines @@
 
     int version = ++requests_counted_;
 
     std::unique_ptr<BasicHttpResponse> http_response(
         StaleWhileRevalidateHeaders());
     http_response->set_content(
         base::StringPrintf("<title>Version %d</title>", version));
 
     // The second time this handler is run is the async revalidation. Tests can
     // use this for synchronisation.
-    if (version == 2) {
-      BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
-                              run_loop_.QuitClosure());
-    }
+    if (version == 2)
+      run_loop_.Quit();
     return std::move(http_response);
   }
 
   // A request handler which increases a cookie value on every request.
   std::unique_ptr<HttpResponse> CookieRequestHandler(
       const HttpRequest& request) {
     static const char kHtml[] =
         "<script>\n"
         "var intervalId;\n"
         "function checkCookie() {\n"
@@ skipping 125 matching lines @@
   NavigateToURL(shell(), GURL("about:blank"));
 
   // The page will load from the cache, then when the async revalidation
   // completes the cookie will update.
   EXPECT_TRUE(TitleBecomes(url, "PASS"));
 }
 
 }  // namespace
 
 }  // namespace content