Convert UserCloudPolicyManagerFactory to TestingFactory

TestingFactory is a base::Callback<> while TestingFactoryFunction
is a function pointer. Convert UserCloudPolicyManagerFactory to
the callback based type.

Bug: 809610
Change-Id: If041d74cf623b29672c90351460f23be9a5fb24d
Reviewed-on: https://chromium-review.googlesource.com/1245713
Commit-Queue: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Sergey Poromov <poromov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#595841}

chrome/browser/policy/cloud/user_cloud_policy_manager_factory.cc

@@ -74,7 +74,7 @@ UserCloudPolicyManagerFactory::CreateForOriginalBrowserContext(
     const scoped_refptr<base::SequencedTaskRunner>& background_task_runner) {
   UserCloudPolicyManagerFactory* factory = GetInstance();
   // If there's a testing factory set, don't bother creating a new one.
-  if (factory->testing_factory_ != NULL)
+  if (factory->testing_factory_)
     return std::unique_ptr<UserCloudPolicyManager>();
   return factory->CreateManagerForOriginalBrowserContext(
       context, force_immediate_load, background_task_runner);
@@ -90,24 +90,23 @@ UserCloudPolicyManagerFactory::RegisterForOffTheRecordBrowserContext(
 }
 
 void UserCloudPolicyManagerFactory::RegisterTestingFactory(
-    TestingFactoryFunction factory) {
+    TestingFactory factory) {
   // Can't set a testing factory when a testing factory has already been
   // created, or after UCPMs have already been built.
   DCHECK(!testing_factory_);
   DCHECK(factory);
   DCHECK(manager_wrappers_.empty());
-  testing_factory_ = factory;
+  testing_factory_ = std::move(factory);
 }
 
 void UserCloudPolicyManagerFactory::ClearTestingFactory() {
-  testing_factory_ = NULL;
+  testing_factory_ = TestingFactory();
 }
 
 UserCloudPolicyManagerFactory::UserCloudPolicyManagerFactory()
     : BrowserContextKeyedBaseFactory(
           "UserCloudPolicyManager",
-        BrowserContextDependencyManager::GetInstance()),
-      testing_factory_(NULL) {
+          BrowserContextDependencyManager::GetInstance()) {
   DependsOn(SchemaRegistryServiceFactory::GetInstance());
 }
 
@@ -191,19 +190,20 @@ void UserCloudPolicyManagerFactory::SetEmptyTestingFactory(
 
 bool UserCloudPolicyManagerFactory::HasTestingFactory(
     content::BrowserContext* context) {
-  return testing_factory_ != NULL;
+  return !testing_factory_.is_null();
 }
 
 // If there's a TestingFactory set, then create a service during BrowserContext
 // initialization.
 bool UserCloudPolicyManagerFactory::ServiceIsCreatedWithBrowserContext() const {
-  return testing_factory_ != NULL;
+  return !testing_factory_.is_null();
 }
 
 void UserCloudPolicyManagerFactory::CreateServiceNow(
     content::BrowserContext* context) {
   DCHECK(testing_factory_);
-  manager_wrappers_[context] = new ManagerWrapper(testing_factory_(context));
+  manager_wrappers_[context] =
+      new ManagerWrapper(testing_factory_.Run(context));
 }
 
 }  // namespace policy

chrome/browser/policy/cloud/user_cloud_policy_manager_factory.h

@@ -8,6 +8,7 @@
 #include <map>
 #include <memory>
 
+#include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/singleton.h"
@@ -68,15 +69,15 @@ class UserCloudPolicyManagerFactory : public BrowserContextKeyedBaseFactory {
       content::BrowserContext* original_context,
       content::BrowserContext* off_the_record_context);
 
-  typedef UserCloudPolicyManager*
-      (*TestingFactoryFunction)(content::BrowserContext* context);
+  using TestingFactory = base::RepeatingCallback<UserCloudPolicyManager*(
+      content::BrowserContext* context)>;
 
   // Allows testing code to inject UserCloudPolicyManager objects for tests.
   // The factory function will be invoked for every Profile created. Because
   // this class does not free the UserCloudPolicyManager objects it manages,
   // it is up to the tests themselves to free the objects after the profile is
   // shut down.
-  void RegisterTestingFactory(TestingFactoryFunction factory);
+  void RegisterTestingFactory(TestingFactory factory);
   void ClearTestingFactory();
 
  private:
@@ -111,7 +112,7 @@ class UserCloudPolicyManagerFactory : public BrowserContextKeyedBaseFactory {
   typedef std::map<content::BrowserContext*, ManagerWrapper*> ManagerWrapperMap;
 
   ManagerWrapperMap manager_wrappers_;
-  TestingFactoryFunction testing_factory_;
+  TestingFactory testing_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(UserCloudPolicyManagerFactory);
 };

chrome/browser/policy/cloud/user_policy_signin_service_unittest.cc

@@ -5,6 +5,7 @@
 #include <memory>
 #include <utility>
 
+#include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/run_loop.h"
 #include "base/test/bind_test_util.h"
@@ -169,7 +170,7 @@ class UserPolicySigninServiceTest : public testing::Test {
     // instances) so we have to inject our testing factory via a special
     // API before creating the profile.
     UserCloudPolicyManagerFactory::GetInstance()->RegisterTestingFactory(
-        BuildCloudPolicyManager);
+        base::BindRepeating(&BuildCloudPolicyManager));
     TestingProfile::Builder builder;
     builder.SetPrefService(
         std::unique_ptr<sync_preferences::PrefServiceSyncable>(