Always use ChannelMojo for content child processes.

content/renderer/render_thread_impl_browsertest.cc

 // Copyright 2013 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 <stddef.h>
 #include <stdint.h>
 #include <utility>
 
@@ skipping 192 matching lines @@
     cmd->AppendSwitchASCII(
         switches::kContentImageTextureTarget,
         cc::BufferToTextureTargetMapToString(
             cc::DefaultBufferToTextureTargetMapForTesting()));
 
     std::unique_ptr<blink::scheduler::RendererScheduler> renderer_scheduler =
         blink::scheduler::RendererScheduler::Create();
     scoped_refptr<base::SingleThreadTaskRunner> test_task_counter(
         test_task_counter_.get());
     thread_ = new RenderThreadImplForTest(
-        InProcessChildThreadParams("", io_task_runner,
+        InProcessChildThreadParams(io_task_runner,
                                    child_connection_->service_token()),
         std::move(renderer_scheduler), test_task_counter);
     cmd->InitFromArgv(old_argv);
 
     test_msg_filter_ = make_scoped_refptr(
         new QuitOnTestMsgFilter(base::MessageLoop::current()));
     thread_->AddFilter(test_msg_filter_.get());
   }
 
   IPC::Sender* sender() { return channel_.get(); }
@@ skipping 149 matching lines @@
                        // These formats are guaranteed to work on all platforms.
                        ::testing::Values(gfx::BufferFormat::R_8,
                                          gfx::BufferFormat::BGR_565,
                                          gfx::BufferFormat::RGBA_4444,
                                          gfx::BufferFormat::RGBA_8888,
                                          gfx::BufferFormat::BGRA_8888,
                                          gfx::BufferFormat::YVU_420)));
 
 }  // namespace
 }  // namespace content