Introduce Identity Service and its initial usage

chrome/browser/profiles/profile_impl.cc

Index: chrome/browser/profiles/profile_impl.cc
diff --git a/chrome/browser/profiles/profile_impl.cc b/chrome/browser/profiles/profile_impl.cc
index cce1253528ea7d313cd6b756e0f0a9cec4a064e5..8cf0d1b3e925b3959278ab4cf7185264b9a30f5a 100644
--- a/chrome/browser/profiles/profile_impl.cc
+++ b/chrome/browser/profiles/profile_impl.cc
@@ -118,6 +118,8 @@
 #include "extensions/features/features.h"
 #include "ppapi/features/features.h"
 #include "printing/features/features.h"
+#include "services/identity/identity_service.h"
+#include "services/identity/public/interfaces/constants.mojom.h"
 #include "services/preferences/public/cpp/pref_service_main.h"
 #include "services/preferences/public/interfaces/preferences.mojom.h"
 #include "services/preferences/public/interfaces/tracked_preference_validation_delegate.mojom.h"
@@ -1075,6 +1077,19 @@ void ProfileImpl::RegisterInProcessServices(StaticServiceMap* services) {
         content::BrowserThread::IO);
     services->insert(std::make_pair(prefs::mojom::kPrefStoreServiceName, info));
   }
+
+  content::ServiceInfo identity_service_info;
+
+  // The Identity Service must run on the UI thread.
+  identity_service_info.task_runner = base::ThreadTaskRunnerHandle::Get();
+
+  // NOTE: The dependencies of the Identity Service have not yet been created,
+  // so it is not possible to bind them here. Instead, bind them at the time
+  // of the actual request to create the Identity Service.
+  identity_service_info.factory =
+      base::Bind(&ProfileImpl::CreateIdentityService, base::Unretained(this));
+  services->insert(
+      std::make_pair(identity::mojom::kServiceName, identity_service_info));
 }
 
 bool ProfileImpl::IsSameProfile(Profile* profile) {
@@ -1333,3 +1348,8 @@ ProfileImpl::CreateDomainReliabilityMonitor(PrefService* local_state) {
   return service->CreateMonitor(
       BrowserThread::GetTaskRunnerForThread(BrowserThread::IO));
 }
+
+std::unique_ptr<service_manager::Service> ProfileImpl::CreateIdentityService() {
+  SigninManagerBase* signin_manager = SigninManagerFactory::GetForProfile(this);
+  return base::MakeUnique<identity::IdentityService>(signin_manager);
+}