Remove calls to deprecated MessageLoop methods in chrome.

chrome/browser/renderer_host/render_process_host_chrome_browsertest.cc

 // Copyright (c) 2012 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 "base/macros.h"
 #include "base/path_service.h"
 #include "base/process/process.h"
+#include "base/run_loop.h"
 #include "base/test/test_timeouts.h"
 #include "build/build_config.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/devtools/devtools_window.h"
 #include "chrome/browser/search/search.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/singleton_tabs.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 97 matching lines @@
     WaitForLauncherThread();
     WaitForMessageProcessing(wc);
     return ProcessFromHandle(wc->GetRenderProcessHost()->GetHandle());
   }
 
   // Ensures that the backgrounding / foregrounding gets a chance to run.
   void WaitForLauncherThread() {
     content::BrowserThread::PostTaskAndReply(
         content::BrowserThread::PROCESS_LAUNCHER, FROM_HERE,
         base::Bind(&base::DoNothing), base::MessageLoop::QuitWhenIdleClosure());
-    base::MessageLoop::current()->Run();
+    base::RunLoop().Run();
   }
 
   // Implicitly waits for the renderer process associated with the specified
   // WebContents to process outstanding IPC messages by running some JavaScript
   // and waiting for the result.
   void WaitForMessageProcessing(WebContents* wc) {
     bool result = false;
     ASSERT_TRUE(content::ExecuteScriptAndExtractBool(
         wc, "window.domAutomationController.send(true);", &result));
     ASSERT_TRUE(result);
@@ skipping 548 matching lines @@
       content::ExecuteScript(audio_tab_web_contents_,
                              "document.getElementById('audioPlayer').play();"));
 
   // Wait until the two pages are not backgrounded.
   while (no_audio_process_.IsProcessBackgrounded() ||
          audio_process_.IsProcessBackgrounded()) {
     base::RunLoop().RunUntilIdle();
     base::PlatformThread::Sleep(TestTimeouts::tiny_timeout());
   }
 }