Add related_applications field to manifest parser.

content/renderer/manifest/manifest_manager.cc

Index: content/renderer/manifest/manifest_manager.cc
diff --git a/content/renderer/manifest/manifest_manager.cc b/content/renderer/manifest/manifest_manager.cc
index a5ee94cf6b59c4d7829d5373c93b434b7f677dcc..f4a613e9066c5533ef1f2073fbe34b1a3eedc59e 100644
--- a/content/renderer/manifest/manifest_manager.cc
+++ b/content/renderer/manifest/manifest_manager.cc
@@ -71,6 +71,12 @@ void ManifestManager::OnRequestManifestComplete(
         ipc_manifest.gcm_sender_id.string().substr(
             0, Manifest::kMaxIPCStringLength),
         ipc_manifest.gcm_sender_id.is_null());
+  for (size_t i = 0; i < ipc_manifest.chrome_related_applications.size(); ++i) {
+    ipc_manifest.chrome_related_applications[i].id = base::NullableString16(
+        ipc_manifest.chrome_related_applications[i].id.string().substr(
+            0, Manifest::kMaxIPCStringLength),
+        ipc_manifest.chrome_related_applications[i].id.is_null());
+  }
 
   Send(new ManifestManagerHostMsg_RequestManifestResponse(
       routing_id(), request_id, ipc_manifest));