Update from https://crrev.com/304121

gpu/ipc/gpu_command_buffer_traits.cc

Index: gpu/ipc/gpu_command_buffer_traits.cc
diff --git a/gpu/ipc/gpu_command_buffer_traits.cc b/gpu/ipc/gpu_command_buffer_traits.cc
index 46395fba97dba499a6a4d75771bf52e6d8d5a64b..1b30034063d75bf6a5bf00382977383adaac7554 100644
--- a/gpu/ipc/gpu_command_buffer_traits.cc
+++ b/gpu/ipc/gpu_command_buffer_traits.cc
@@ -3,8 +3,27 @@
 // found in the LICENSE file.
 
 #include "gpu/ipc/gpu_command_buffer_traits.h"
+
 #include "gpu/command_buffer/common/mailbox_holder.h"
 
+// Generate param traits write methods.
+#include "ipc/param_traits_write_macros.h"
+namespace IPC {
+#include "gpu/ipc/gpu_command_buffer_traits_multi.h"
+}  // namespace IPC
+
+// Generate param traits read methods.
+#include "ipc/param_traits_read_macros.h"
+namespace IPC {
+#include "gpu/ipc/gpu_command_buffer_traits_multi.h"
+}  // namespace IPC
+
+// Generate param traits log methods.
+#include "ipc/param_traits_log_macros.h"
+namespace IPC {
+#include "gpu/ipc/gpu_command_buffer_traits_multi.h"
+}  // namespace IPC
+
 namespace IPC {
 
 void ParamTraits<gpu::CommandBuffer::State> ::Write(Message* m,