Add embedder api for participating in gpu logic

content/gpu/gpu_child_thread.cc

Index: content/gpu/gpu_child_thread.cc
diff --git a/content/gpu/gpu_child_thread.cc b/content/gpu/gpu_child_thread.cc
index b9f7bc5442aabdda8398c56817ef52b8cde3f822..392804911abb3aabe9f2ed76c4d9173a7aa6c061 100644
--- a/content/gpu/gpu_child_thread.cc
+++ b/content/gpu/gpu_child_thread.cc
@@ -19,6 +19,7 @@
 #include "content/gpu/gpu_watchdog_thread.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_switches.h"
+#include "content/public/gpu/content_gpu_client.h"
 #include "gpu/config/gpu_info_collector.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_sync_message_filter.h"
@@ -199,6 +200,8 @@ void GpuChildThread::Init(const base::Time& process_start_time) {
   // will be destroyed before GpuChildThread is destructed.
   service_registry()->AddService(base::Bind(
       &GpuChildThread::BindProcessControlRequest, base::Unretained(this)));
+
+  GetContentClient()->gpu()->RegisterMojoServices(service_registry());
 }
 
 bool GpuChildThread::Send(IPC::Message* msg) {