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

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index 3fc1dfe73df87f6b55529d03272309c81182b151..82aebb6335fbbd509d002a17a1e3220f94f6d876 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -1780,10 +1780,7 @@ scoped_refptr<gpu::GpuChannelHost> RenderThreadImpl::EstablishGpuChannelSync(
   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;
   }