Always use ChannelMojo for content child processes.

content/renderer/render_thread_impl.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 "content/renderer/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <utility>
@@ skipping 582 matching lines @@
     mojom::RenderMessageFilter* render_message_filter) {
   g_render_message_filter_for_testing = render_message_filter;
 }
 
 RenderThreadImpl::RenderThreadImpl(
     const InProcessChildThreadParams& params,
     std::unique_ptr<blink::scheduler::RendererScheduler> scheduler,
     scoped_refptr<base::SingleThreadTaskRunner>& resource_task_queue)
     : ChildThreadImpl(Options::Builder()
                           .InBrowserProcess(params)
-                          .UseMojoChannel(true)
                           .AutoStartMojoShellConnection(false)
                           .ConnectToBrowser(true)
                           .Build()),
       renderer_scheduler_(std::move(scheduler)),
       time_zone_monitor_binding_(this),
       categorized_worker_pool_(new CategorizedWorkerPool()),
       renderer_binding_(this) {
   Init(resource_task_queue);
 }
 
 // When we run plugins in process, we actually run them on the render thread,
 // which means that we need to make the render thread pump UI events.
 RenderThreadImpl::RenderThreadImpl(
     std::unique_ptr<base::MessageLoop> main_message_loop,
     std::unique_ptr<blink::scheduler::RendererScheduler> scheduler)
     : ChildThreadImpl(Options::Builder()
-                          .UseMojoChannel(true)
                           .AutoStartMojoShellConnection(false)
                           .ConnectToBrowser(true)
                           .Build()),
       renderer_scheduler_(std::move(scheduler)),
       time_zone_monitor_binding_(this),
       main_message_loop_(std::move(main_message_loop)),
       categorized_worker_pool_(new CategorizedWorkerPool()),
       renderer_binding_(this) {
   scoped_refptr<base::SingleThreadTaskRunner> test_task_counter;
   Init(test_task_counter);
@@ skipping 1700 matching lines @@
   }
 }
 
 void RenderThreadImpl::OnRendererInterfaceRequest(
     mojom::RendererAssociatedRequest request) {
   DCHECK(!renderer_binding_.is_bound());
   renderer_binding_.Bind(std::move(request));
 }
 
 }  // namespace content