Fix crash during sync load of the signin profile

chrome/browser/policy/schema_registry_service_factory.cc

Index: chrome/browser/policy/schema_registry_service_factory.cc
diff --git a/chrome/browser/policy/schema_registry_service_factory.cc b/chrome/browser/policy/schema_registry_service_factory.cc
index 6c9fd50b43cc265bcabeb970a71404ad8108e030..6d72d85b2f2d16d6922409fb2d08c9d643e3d43f 100644
--- a/chrome/browser/policy/schema_registry_service_factory.cc
+++ b/chrome/browser/policy/schema_registry_service_factory.cc
@@ -18,6 +18,7 @@
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_process_platform_part_chromeos.h"
 #include "chrome/browser/chromeos/policy/browser_policy_connector_chromeos.h"
+#include "chrome/browser/chromeos/policy/device_cloud_policy_manager_chromeos.h"
 #include "chrome/browser/chromeos/policy/device_local_account_policy_service.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/profiles/profile.h"
@@ -123,6 +124,23 @@ SchemaRegistryServiceFactory::CreateForContextInternal(
   if (!registry)
     registry.reset(new SchemaRegistry);
 
+#if defined(OS_CHROMEOS)
+  Profile* const profile = Profile::FromBrowserContext(context);
+  if (chromeos::ProfileHelper::IsSigninProfile(profile)) {
+    // Pass the SchemaRegistry of the signin profile to device cloud policy
+    // manager, for being used for fetching the component policies.
+    policy::DeviceCloudPolicyManagerChromeOS* device_cloud_policy_manager =
+        g_browser_process->platform_part()
+            ->browser_policy_connector_chromeos()
+            ->GetDeviceCloudPolicyManager();
+    // TODO(tnagel): Do we need to do something for Active Directory management?
+    if (device_cloud_policy_manager) {
+      device_cloud_policy_manager->SetSigninProfileSchemaRegistry(
+          registry.get());
+    }
+  }
+#endif
+
   std::unique_ptr<SchemaRegistryService> service(new SchemaRegistryService(
       std::move(registry), chrome_schema, global_registry));
   registries_[context] = service.get();