Add more GN deps to the build.

build/secondary/third_party/cacheinvalidation/src/google/cacheinvalidation/BUILD.gn

+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//third_party/protobuf/proto_library.gni")
+
+proto_library("cacheinvalidation_proto_cpp") {
+  # Depend on cacheinvalidation instead.
+  visibility = "//third_party/cacheinvalidation/*"
+
+  sources = [
+    "client.proto",
+    "client_gateway.proto",
+    "client_protocol.proto",
+    "client_test_internal.proto",
+    "types.proto",
+  ]
+
+  if (!is_android) {
+    sources += [
+      "android_channel.proto",
+      "channel_common.proto",
+    ]
+  }
+
+  proto_out_dir = "google/cacheinvalidation"
+}
+