Use ChannelMojo for Browser-GPU and Renderer-GPU IPC.

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 1762 matching lines @@
     gpu_channel_->DestroyChannel();
     gpu_channel_ = NULL;
   }
 
   // Ask the browser for the channel name.
   int client_id = 0;
   IPC::ChannelHandle channel_handle;
   gpu::GPUInfo gpu_info;
   if (!Send(new ChildProcessHostMsg_EstablishGpuChannel(
           cause_for_gpu_launch, &client_id, &channel_handle, &gpu_info)) ||
-#if defined(OS_POSIX)
-      channel_handle.socket.fd == -1 ||
-#endif
-      channel_handle.name.empty()) {
+      !channel_handle.mojo_handle.is_valid()) {
     // Otherwise cancel the connection.
     return NULL;
   }
 
   GetContentClient()->SetGpuInfo(gpu_info);
 
   // Cache some variables that are needed on the compositor thread for our
   // implementation of GpuChannelHostFactory.
   io_thread_task_runner_ = ChildProcess::current()->io_task_runner();
 
@@ skipping 420 matching lines @@
       v8_memory_pressure_level == v8::MemoryPressureLevel::kCritical)
     v8_memory_pressure_level = v8::MemoryPressureLevel::kModerate;
 
   blink::mainThreadIsolate()->MemoryPressureNotification(
       v8_memory_pressure_level);
   blink::MemoryPressureNotificationToWorkerThreadIsolates(
       v8_memory_pressure_level);
 }
 
 }  // namespace content