Remove calls to deprecated MessageLoop methods on Windows and Linux.

content/browser/frame_host/render_widget_host_view_guest_unittest.cc

 // Copyright 2014 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 "content/browser/frame_host/render_widget_host_view_guest.h"
 
 #include <stdint.h>
 #include <utility>
 
 #include "base/macros.h"
@@ skipping 64 matching lines @@
 
   void TearDown() override {
     if (view_)
       view_->Destroy();
     delete widget_host_;
 
     browser_context_.reset();
 
     message_loop_.task_runner()->DeleteSoon(FROM_HERE,
                                             browser_context_.release());
-    message_loop_.RunUntilIdle();
+    base::RunLoop().RunUntilIdle();
 #if !defined(OS_ANDROID)
     ImageTransportFactory::Terminate();
 #else
     ui::ContextProviderFactory::SetInstance(nullptr);
 #endif
   }
 
  protected:
   base::MessageLoopForUI message_loop_;
   std::unique_ptr<BrowserContext> browser_context_;
@@ skipping 197 matching lines @@
 
   browser_plugin_guest_->set_attached(false);
   browser_plugin_guest_->ResetTestData();
 
   view_->OnSwapCompositorFrame(
       0, CreateDelegatedFrame(scale_factor, view_size, view_rect));
   EXPECT_TRUE(surface_id().is_null());
 }
 
 }  // namespace content