[GRC] Fix BUILD.gn for blink.

services/resource_coordinator/public/interfaces/BUILD.gn

 # Copyright 2017 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("//mojo/public/tools/bindings/mojom.gni")
 
 mojom("interfaces_internal") {
   visibility = [ "//services/resource_coordinator/public/cpp:*" ]
 
   sources = [
     "coordination_unit.mojom",
     "coordination_unit_provider.mojom",
     "events.mojom",
     "memory_instrumentation/constants.mojom",
     "memory_instrumentation/memory_instrumentation.mojom",
     "service_constants.mojom",
     "tracing/tracing.mojom",
   ]
 
   public_deps = [
     "//mojo/common:common_custom_types",
   ]
 
   component_output_prefix = "resource_coordinator_public_interfaces_internal"
   export_class_attribute = "SERVICES_RESOURCE_COORDINATOR_PUBLIC_CPP_EXPORT"
   export_define = "SERVICES_RESOURCE_COORDINATOR_PUBLIC_CPP_IMPLEMENTATION=1"
   export_header =
       "services/resource_coordinator/public/cpp/resource_coordinator_export.h"
 
+  export_class_attribute_blink =
+      "SERVICES_RESOURCE_COORDINATOR_PUBLIC_CPP_EXPORT"
+  export_define_blink =
+      "SERVICES_RESOURCE_COORDINATOR_PUBLIC_CPP_IMPLEMENTATION=1"
+  export_header_blink =
+      "services/resource_coordinator/public/cpp/resource_coordinator_export.h"
+
   # TODO(crbug.com/714018): Convert the implementation to use OnceCallback.
   use_once_callback = false
 }