Support Serializing and Deserializing RepeatedField / RepeatedPtrField in IPC::Message

ipc/BUILD.gn

Index: ipc/BUILD.gn
diff --git a/ipc/BUILD.gn b/ipc/BUILD.gn
index c776d5826840549897a107b8de112eb7e57f2d6f..3d48207abe24be1b7370c7ae5066cb1ca3c8a1be 100644
--- a/ipc/BUILD.gn
+++ b/ipc/BUILD.gn
@@ -7,6 +7,7 @@ import("//build/config/nacl/config.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//testing/test.gni")
 import("//tools/ipc_fuzzer/ipc_fuzzer.gni")
+import("//third_party/protobuf/proto_library.gni")
 
 declare_args() {
   # Enabling debug builds automatically sets enable_ipc_logging to true.
@@ -122,6 +123,17 @@ component("ipc") {
     "//mojo/public/cpp/bindings",
     "//mojo/public/cpp/system",
   ]
+
+  if (!is_nacl_nonsfi) {
+    sources += [
+      "ipc_message_protobuf_utils.h",
+    ]
+
+    public_deps += [
+      "//third_party/protobuf:protobuf_lite",
+    ]
+  }
+
   deps = [
     "//base",
   ]
@@ -176,6 +188,12 @@ if (!is_ios) {
     ]
   }
 
+  proto_library("test_proto") {
+    sources = [
+      "test_proto.proto",
+    ]
+  }
+
   test("ipc_tests") {
     sources = [
       "ipc_channel_mojo_unittest.cc",
@@ -203,6 +221,7 @@ if (!is_ios) {
       ":ipc",
       ":run_all_unittests",
       ":test_interfaces",
+      ":test_proto",
       ":test_support",
       "//base",
       "//base:i18n",
@@ -223,6 +242,12 @@ if (!is_ios) {
         "sync_socket_unittest.cc",
       ]
     }
+
+    if (!is_nacl_nonsfi) {
+      sources += [
+        "ipc_message_protobuf_utils_unittest.cc",
+      ]
+    }
   }
 
   test("ipc_perftests") {