Reduce GPU mailbox size to 16 bytes

gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h

Index: gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h
diff --git a/gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h b/gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h
index cdebc20396d7bf2658cbff21a4da224239ae97ac..9d6b4a5c69786d0e371261367e746f6f321b052e 100644
--- a/gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h
+++ b/gpu/command_buffer/common/gles2_cmd_utils_implementation_autogen.h
@@ -3454,10 +3454,10 @@ static const GLES2Util::EnumToString enum_to_string_table[] = {
         1, "GL_ES_VERSION_2_0",
     },
     {
-        24, "GL_SYNC_TOKEN_SIZE_CHROMIUM",
+        16, "GL_MAILBOX_SIZE_CHROMIUM",
     },
     {
-        64, "GL_MAILBOX_SIZE_CHROMIUM",
+        24, "GL_SYNC_TOKEN_SIZE_CHROMIUM",
     },
 };