Do not create GCM store if it is not needed

google_apis/gcm/engine/gcm_store_impl_unittest.cc

 // Copyright 2014 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.
 
 #include "google_apis/gcm/engine/gcm_store_impl.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 29 matching lines @@
 
 const uint64 kDeviceId = 22;
 const uint64 kDeviceToken = 55;
 
 class GCMStoreImplTest : public testing::Test {
  public:
   GCMStoreImplTest();
   ~GCMStoreImplTest() override;
 
   scoped_ptr<GCMStoreImpl> BuildGCMStore();
+  void LoadGCMStore(
+      GCMStoreImpl* gcm_store, scoped_ptr<GCMStore::LoadResult>* result_dst);
 
   std::string GetNextPersistentId();
 
   void PumpLoop();
 
   void LoadCallback(scoped_ptr<GCMStore::LoadResult>* result_dst,
                     scoped_ptr<GCMStore::LoadResult> result);
+  void LoadWithoutCheckCallback(scoped_ptr<GCMStore::LoadResult>* result_dst,
+                                scoped_ptr<GCMStore::LoadResult> result);
   void UpdateCallback(bool success);
 
  protected:
   base::MessageLoop message_loop_;
   base::ScopedTempDir temp_directory_;
   bool expected_success_;
   uint64 next_persistent_id_;
   scoped_ptr<base::RunLoop> run_loop_;
 };
 
 GCMStoreImplTest::GCMStoreImplTest()
     : expected_success_(true),
       next_persistent_id_(base::Time::Now().ToInternalValue()) {
   EXPECT_TRUE(temp_directory_.CreateUniqueTempDir());
   run_loop_.reset(new base::RunLoop());
 }
 
 GCMStoreImplTest::~GCMStoreImplTest() {}
 
 scoped_ptr<GCMStoreImpl> GCMStoreImplTest::BuildGCMStore() {
   return scoped_ptr<GCMStoreImpl>(new GCMStoreImpl(
-      temp_directory_.path(),
+      // Pass an non-existent directory as store path to match the exact
+      // behavior in the production code. Currently GCMStoreImpl checks if
+      // the directory exist or not to determine the store existence.
+      temp_directory_.path().Append(FILE_PATH_LITERAL("GCM Store")),
       message_loop_.message_loop_proxy(),
       make_scoped_ptr<Encryptor>(new FakeEncryptor)));
 }
 
+void GCMStoreImplTest::LoadGCMStore(
+    GCMStoreImpl* gcm_store, scoped_ptr<GCMStore::LoadResult>* result_dst) {
+  gcm_store->Load(
+      GCMStore::CREATE_NEW_STORE_IF_NOT_EXISTS,
+      base::Bind(&GCMStoreImplTest::LoadCallback,
+                 base::Unretained(this),
+                 result_dst));
+  PumpLoop();
+}
+
 std::string GCMStoreImplTest::GetNextPersistentId() {
   return base::Uint64ToString(next_persistent_id_++);
 }
 
 void GCMStoreImplTest::PumpLoop() { message_loop_.RunUntilIdle(); }
 
 void GCMStoreImplTest::LoadCallback(
     scoped_ptr<GCMStore::LoadResult>* result_dst,
     scoped_ptr<GCMStore::LoadResult> result) {
   ASSERT_TRUE(result->success);
+  LoadWithoutCheckCallback(result_dst, result.Pass());
+}
+
+void GCMStoreImplTest::LoadWithoutCheckCallback(
+    scoped_ptr<GCMStore::LoadResult>* result_dst,
+    scoped_ptr<GCMStore::LoadResult> result) {
   *result_dst = result.Pass();
   run_loop_->Quit();
   run_loop_.reset(new base::RunLoop());
 }
 
 void GCMStoreImplTest::UpdateCallback(bool success) {
   ASSERT_EQ(expected_success_, success);
 }
 
 // Verify creating a new database and loading it.
 TEST_F(GCMStoreImplTest, LoadNew) {
-  scoped_ptr<GCMStore> gcm_store(BuildGCMStore());
+  scoped_ptr<GCMStoreImpl> gcm_store(BuildGCMStore());
   scoped_ptr<GCMStore::LoadResult> load_result;
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   EXPECT_EQ(0U, load_result->device_android_id);
   EXPECT_EQ(0U, load_result->device_security_token);
   EXPECT_TRUE(load_result->incoming_messages.empty());
   EXPECT_TRUE(load_result->outgoing_messages.empty());
   EXPECT_TRUE(load_result->gservices_settings.empty());
   EXPECT_EQ(base::Time::FromInternalValue(0LL), load_result->last_checkin_time);
 }
 
+// Verify new database is not created when DO_NOT_CREATE_NEW_STORE is passed.
+TEST_F(GCMStoreImplTest, LoadWithoutCreatingNewStore) {
+  scoped_ptr<GCMStoreImpl> gcm_store(BuildGCMStore());
+  scoped_ptr<GCMStore::LoadResult> load_result;
+  gcm_store->Load(
+      GCMStore::DO_NOT_CREATE_NEW_STORE,
+      base::Bind(&GCMStoreImplTest::LoadWithoutCheckCallback,
+                 base::Unretained(this),
+                 &load_result));
+  PumpLoop();
+
+  EXPECT_FALSE(load_result->success);
+  EXPECT_TRUE(load_result->store_does_not_exist);
+}
+
 TEST_F(GCMStoreImplTest, DeviceCredentials) {
-  scoped_ptr<GCMStore> gcm_store(BuildGCMStore());
+  scoped_ptr<GCMStoreImpl> gcm_store(BuildGCMStore());
   scoped_ptr<GCMStore::LoadResult> load_result;
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   gcm_store->SetDeviceCredentials(
       kDeviceId,
       kDeviceToken,
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
 
   gcm_store = BuildGCMStore().Pass();
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   ASSERT_EQ(kDeviceId, load_result->device_android_id);
   ASSERT_EQ(kDeviceToken, load_result->device_security_token);
 }
 
 TEST_F(GCMStoreImplTest, LastCheckinInfo) {
   scoped_ptr<GCMStoreImpl> gcm_store(BuildGCMStore());
   scoped_ptr<GCMStore::LoadResult> load_result;
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   base::Time last_checkin_time = base::Time::Now();
   std::set<std::string> accounts;
   accounts.insert("test_user1@gmail.com");
   accounts.insert("test_user2@gmail.com");
 
   gcm_store->SetLastCheckinInfo(
       last_checkin_time,
       accounts,
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
 
   gcm_store = BuildGCMStore().Pass();
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
   ASSERT_EQ(last_checkin_time, load_result->last_checkin_time);
   ASSERT_EQ(accounts, load_result->last_checkin_accounts);
 
   // Negative cases, where the value read is gibberish.
   gcm_store->SetValueForTesting(
       "last_checkin_time",
       "gibberish",
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
 
   gcm_store = BuildGCMStore().Pass();
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
   EXPECT_EQ(base::Time(), load_result->last_checkin_time);
 }
 
 TEST_F(GCMStoreImplTest, GServicesSettings_ProtocolV2) {
-  scoped_ptr<GCMStore> gcm_store(BuildGCMStore());
+  scoped_ptr<GCMStoreImpl> gcm_store(BuildGCMStore());
   scoped_ptr<GCMStore::LoadResult> load_result;
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   std::map<std::string, std::string> settings;
   settings["checkin_interval"] = "12345";
   settings["mcs_port"] = "438";
   settings["checkin_url"] = "http://checkin.google.com";
   std::string digest = "digest1";
 
   gcm_store->SetGServicesSettings(
       settings,
       digest,
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
 
   gcm_store = BuildGCMStore().Pass();
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   ASSERT_EQ(settings, load_result->gservices_settings);
   ASSERT_EQ(digest, load_result->gservices_digest);
 
   // Remove some, and add some.
   settings.clear();
   settings["checkin_interval"] = "54321";
   settings["registration_url"] = "http://registration.google.com";
   digest = "digest2";
 
   gcm_store->SetGServicesSettings(
       settings,
       digest,
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
 
   gcm_store = BuildGCMStore().Pass();
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   ASSERT_EQ(settings, load_result->gservices_settings);
   ASSERT_EQ(digest, load_result->gservices_digest);
 }
 
 TEST_F(GCMStoreImplTest, Registrations) {
-  scoped_ptr<GCMStore> gcm_store(BuildGCMStore());
+  scoped_ptr<GCMStoreImpl> gcm_store(BuildGCMStore());
   scoped_ptr<GCMStore::LoadResult> load_result;
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   // Add one registration with one sender.
   std::string registration = "sender1=registration1";
   gcm_store->AddRegistration(
       kAppName,
       registration,
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
 
   // Add one registration with multiple senders.
   std::string registration2 = "sender1,sender2=registration2";
   gcm_store->AddRegistration(
       kAppName2,
       registration2,
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
 
   gcm_store = BuildGCMStore().Pass();
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   ASSERT_EQ(2u, load_result->registrations.size());
   ASSERT_TRUE(load_result->registrations.find(kAppName) !=
               load_result->registrations.end());
   EXPECT_EQ(registration, load_result->registrations[kAppName]);
   ASSERT_TRUE(load_result->registrations.find(kAppName2) !=
               load_result->registrations.end());
   EXPECT_EQ(registration2, load_result->registrations[kAppName2]);
 
   gcm_store->RemoveRegistration(
       kAppName2,
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
 
   gcm_store = BuildGCMStore().Pass();
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   ASSERT_EQ(1u, load_result->registrations.size());
   ASSERT_TRUE(load_result->registrations.find(kAppName) !=
               load_result->registrations.end());
   EXPECT_EQ(registration, load_result->registrations[kAppName]);
 }
 
 // Verify saving some incoming messages, reopening the directory, and then
 // removing those incoming messages.
 TEST_F(GCMStoreImplTest, IncomingMessages) {
-  scoped_ptr<GCMStore> gcm_store(BuildGCMStore());
+  scoped_ptr<GCMStoreImpl> gcm_store(BuildGCMStore());
   scoped_ptr<GCMStore::LoadResult> load_result;
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   std::vector<std::string> persistent_ids;
   for (int i = 0; i < kNumPersistentIds; ++i) {
     persistent_ids.push_back(GetNextPersistentId());
     gcm_store->AddIncomingMessage(
         persistent_ids.back(),
         base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
     PumpLoop();
   }
 
   gcm_store = BuildGCMStore().Pass();
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   ASSERT_EQ(persistent_ids, load_result->incoming_messages);
   ASSERT_TRUE(load_result->outgoing_messages.empty());
 
   gcm_store->RemoveIncomingMessages(
       persistent_ids,
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
 
   gcm_store = BuildGCMStore().Pass();
   load_result->incoming_messages.clear();
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   ASSERT_TRUE(load_result->incoming_messages.empty());
   ASSERT_TRUE(load_result->outgoing_messages.empty());
 }
 
 // Verify saving some outgoing messages, reopening the directory, and then
 // removing those outgoing messages.
 TEST_F(GCMStoreImplTest, OutgoingMessages) {
-  scoped_ptr<GCMStore> gcm_store(BuildGCMStore());
+  scoped_ptr<GCMStoreImpl> gcm_store(BuildGCMStore());
   scoped_ptr<GCMStore::LoadResult> load_result;
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   std::vector<std::string> persistent_ids;
   const int kNumPersistentIds = 10;
   for (int i = 0; i < kNumPersistentIds; ++i) {
     persistent_ids.push_back(GetNextPersistentId());
     mcs_proto::DataMessageStanza message;
     message.set_from(kAppName + persistent_ids.back());
     message.set_category(kCategoryName + persistent_ids.back());
     gcm_store->AddOutgoingMessage(
         persistent_ids.back(),
         MCSMessage(message),
         base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
     PumpLoop();
   }
 
   gcm_store = BuildGCMStore().Pass();
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   ASSERT_TRUE(load_result->incoming_messages.empty());
   ASSERT_EQ(load_result->outgoing_messages.size(), persistent_ids.size());
   for (int i = 0; i < kNumPersistentIds; ++i) {
     std::string id = persistent_ids[i];
     ASSERT_TRUE(load_result->outgoing_messages[id].get());
     const mcs_proto::DataMessageStanza* message =
         reinterpret_cast<mcs_proto::DataMessageStanza*>(
             load_result->outgoing_messages[id].get());
     ASSERT_EQ(message->from(), kAppName + id);
     ASSERT_EQ(message->category(), kCategoryName + id);
   }
 
   gcm_store->RemoveOutgoingMessages(
       persistent_ids,
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
 
   gcm_store = BuildGCMStore().Pass();
   load_result->outgoing_messages.clear();
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   ASSERT_TRUE(load_result->incoming_messages.empty());
   ASSERT_TRUE(load_result->outgoing_messages.empty());
 }
 
 // Verify incoming and outgoing messages don't conflict.
 TEST_F(GCMStoreImplTest, IncomingAndOutgoingMessages) {
-  scoped_ptr<GCMStore> gcm_store(BuildGCMStore());
+  scoped_ptr<GCMStoreImpl> gcm_store(BuildGCMStore());
   scoped_ptr<GCMStore::LoadResult> load_result;
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   std::vector<std::string> persistent_ids;
   const int kNumPersistentIds = 10;
   for (int i = 0; i < kNumPersistentIds; ++i) {
     persistent_ids.push_back(GetNextPersistentId());
     gcm_store->AddIncomingMessage(
         persistent_ids.back(),
         base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
     PumpLoop();
 
     mcs_proto::DataMessageStanza message;
     message.set_from(kAppName + persistent_ids.back());
     message.set_category(kCategoryName + persistent_ids.back());
     gcm_store->AddOutgoingMessage(
         persistent_ids.back(),
         MCSMessage(message),
         base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
     PumpLoop();
   }
 
   gcm_store = BuildGCMStore().Pass();
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   ASSERT_EQ(persistent_ids, load_result->incoming_messages);
   ASSERT_EQ(load_result->outgoing_messages.size(), persistent_ids.size());
   for (int i = 0; i < kNumPersistentIds; ++i) {
     std::string id = persistent_ids[i];
     ASSERT_TRUE(load_result->outgoing_messages[id].get());
     const mcs_proto::DataMessageStanza* message =
         reinterpret_cast<mcs_proto::DataMessageStanza*>(
             load_result->outgoing_messages[id].get());
     ASSERT_EQ(message->from(), kAppName + id);
     ASSERT_EQ(message->category(), kCategoryName + id);
   }
 
   gcm_store->RemoveIncomingMessages(
       persistent_ids,
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
   gcm_store->RemoveOutgoingMessages(
       persistent_ids,
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
 
   gcm_store = BuildGCMStore().Pass();
   load_result->incoming_messages.clear();
   load_result->outgoing_messages.clear();
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   ASSERT_TRUE(load_result->incoming_messages.empty());
   ASSERT_TRUE(load_result->outgoing_messages.empty());
 }
 
 // Test that per-app message limits are enforced, persisted across restarts,
 // and updated as messages are removed.
 TEST_F(GCMStoreImplTest, PerAppMessageLimits) {
-  scoped_ptr<GCMStore> gcm_store(BuildGCMStore());
+  scoped_ptr<GCMStoreImpl> gcm_store(BuildGCMStore());
   scoped_ptr<GCMStore::LoadResult> load_result;
-  gcm_store->Load(base::Bind(&GCMStoreImplTest::LoadCallback,
-                             base::Unretained(this),
-                             &load_result));
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   // Add the initial (below app limit) messages.
   for (int i = 0; i < kNumMessagesPerApp; ++i) {
     mcs_proto::DataMessageStanza message;
     message.set_from(kAppName);
     message.set_category(kCategoryName);
     EXPECT_TRUE(gcm_store->AddOutgoingMessage(
                     base::IntToString(i),
                     MCSMessage(message),
                     base::Bind(&GCMStoreImplTest::UpdateCallback,
                                base::Unretained(this))));
     PumpLoop();
   }
 
   // Attempting to add some more should fail.
   for (int i = 0; i < kNumMessagesPerApp; ++i) {
     mcs_proto::DataMessageStanza message;
     message.set_from(kAppName);
     message.set_category(kCategoryName);
     EXPECT_FALSE(gcm_store->AddOutgoingMessage(
                      base::IntToString(i + kNumMessagesPerApp),
                      MCSMessage(message),
                      base::Bind(&GCMStoreImplTest::UpdateCallback,
                                 base::Unretained(this))));
     PumpLoop();
   }
 
   // Tear down and restore the database.
   gcm_store = BuildGCMStore().Pass();
-  gcm_store->Load(base::Bind(&GCMStoreImplTest::LoadCallback,
-                             base::Unretained(this),
-                             &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   // Adding more messages should still fail.
   for (int i = 0; i < kNumMessagesPerApp; ++i) {
     mcs_proto::DataMessageStanza message;
     message.set_from(kAppName);
     message.set_category(kCategoryName);
     EXPECT_FALSE(gcm_store->AddOutgoingMessage(
                      base::IntToString(i + kNumMessagesPerApp),
                      MCSMessage(message),
                      base::Bind(&GCMStoreImplTest::UpdateCallback,
@@ skipping 18 matching lines @@
     EXPECT_TRUE(gcm_store->AddOutgoingMessage(
                     base::IntToString(i + kNumMessagesPerApp),
                     MCSMessage(message),
                     base::Bind(&GCMStoreImplTest::UpdateCallback,
                                base::Unretained(this))));
     PumpLoop();
   }
 }
 
 TEST_F(GCMStoreImplTest, AccountMapping) {
-  scoped_ptr<GCMStore> gcm_store(BuildGCMStore());
+  scoped_ptr<GCMStoreImpl> gcm_store(BuildGCMStore());
   scoped_ptr<GCMStore::LoadResult> load_result;
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   // Add account mappings.
   AccountMapping account_mapping1;
   account_mapping1.account_id = "account_id_1";
   account_mapping1.email = "account_id_1@gmail.com";
   account_mapping1.access_token = "account_token1";
   account_mapping1.status = AccountMapping::ADDING;
   account_mapping1.status_change_timestamp = base::Time();
   account_mapping1.last_message_id = "message_1";
 
   AccountMapping account_mapping2;
   account_mapping2.account_id = "account_id_2";
   account_mapping2.email = "account_id_2@gmail.com";
   account_mapping2.access_token = "account_token1";
   account_mapping2.status = AccountMapping::REMOVING;
   account_mapping2.status_change_timestamp =
       base::Time::FromInternalValue(1305734521259935LL);
   account_mapping2.last_message_id = "message_2";
 
   gcm_store->AddAccountMapping(
       account_mapping1,
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
   gcm_store->AddAccountMapping(
       account_mapping2,
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
 
   gcm_store = BuildGCMStore().Pass();
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   EXPECT_EQ(2UL, load_result->account_mappings.size());
   GCMStore::AccountMappings::iterator iter =
       load_result->account_mappings.begin();
   EXPECT_EQ(account_mapping1.account_id, iter->account_id);
   EXPECT_EQ(account_mapping1.email, iter->email);
   EXPECT_TRUE(iter->access_token.empty());
   EXPECT_EQ(AccountMapping::ADDING, iter->status);
   EXPECT_EQ(account_mapping1.status_change_timestamp,
             iter->status_change_timestamp);
   EXPECT_EQ(account_mapping1.last_message_id, iter->last_message_id);
   ++iter;
   EXPECT_EQ(account_mapping2.account_id, iter->account_id);
   EXPECT_EQ(account_mapping2.email, iter->email);
   EXPECT_TRUE(iter->access_token.empty());
   EXPECT_EQ(AccountMapping::REMOVING, iter->status);
   EXPECT_EQ(account_mapping2.status_change_timestamp,
             iter->status_change_timestamp);
   EXPECT_EQ(account_mapping2.last_message_id, iter->last_message_id);
 
   gcm_store->RemoveAccountMapping(
       account_mapping1.account_id,
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
 
   gcm_store = BuildGCMStore().Pass();
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   EXPECT_EQ(1UL, load_result->account_mappings.size());
   iter = load_result->account_mappings.begin();
   EXPECT_EQ(account_mapping2.account_id, iter->account_id);
   EXPECT_EQ(account_mapping2.email, iter->email);
   EXPECT_TRUE(iter->access_token.empty());
   EXPECT_EQ(AccountMapping::REMOVING, iter->status);
   EXPECT_EQ(account_mapping2.status_change_timestamp,
             iter->status_change_timestamp);
   EXPECT_EQ(account_mapping2.last_message_id, iter->last_message_id);
 }
 
 TEST_F(GCMStoreImplTest, HeartbeatInterval) {
-  scoped_ptr<GCMStore> gcm_store(BuildGCMStore());
+  scoped_ptr<GCMStoreImpl> gcm_store(BuildGCMStore());
   scoped_ptr<GCMStore::LoadResult> load_result;
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   std::string scope1 = "scope1";
   std::string scope2 = "scope2";
   int heartbeat1 = 120 * 1000;
   int heartbeat2 = 360 * 1000;
 
   gcm_store->AddHeartbeatInterval(
       scope1,
       heartbeat1,
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
   gcm_store->AddHeartbeatInterval(
       scope2,
       heartbeat2,
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
 
   gcm_store = BuildGCMStore().Pass();
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   EXPECT_EQ(2UL, load_result->heartbeat_intervals.size());
   ASSERT_TRUE(load_result->heartbeat_intervals.find(scope1) !=
               load_result->heartbeat_intervals.end());
   EXPECT_EQ(heartbeat1, load_result->heartbeat_intervals[scope1]);
   ASSERT_TRUE(load_result->heartbeat_intervals.find(scope2) !=
               load_result->heartbeat_intervals.end());
   EXPECT_EQ(heartbeat2, load_result->heartbeat_intervals[scope2]);
 
   gcm_store->RemoveHeartbeatInterval(
       scope2,
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
 
   gcm_store = BuildGCMStore().Pass();
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   EXPECT_EQ(1UL, load_result->heartbeat_intervals.size());
   ASSERT_TRUE(load_result->heartbeat_intervals.find(scope1) !=
               load_result->heartbeat_intervals.end());
   EXPECT_EQ(heartbeat1, load_result->heartbeat_intervals[scope1]);
 }
 
 // When the database is destroyed, all database updates should fail. At the
 // same time, they per-app message counts should not go up, as failures should
 // result in decrementing the counts.
 TEST_F(GCMStoreImplTest, AddMessageAfterDestroy) {
-  scoped_ptr<GCMStore> gcm_store(BuildGCMStore());
+  scoped_ptr<GCMStoreImpl> gcm_store(BuildGCMStore());
   scoped_ptr<GCMStore::LoadResult> load_result;
-  gcm_store->Load(base::Bind(&GCMStoreImplTest::LoadCallback,
-                             base::Unretained(this),
-                             &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
   gcm_store->Destroy(base::Bind(&GCMStoreImplTest::UpdateCallback,
                                base::Unretained(this)));
   PumpLoop();
 
   expected_success_ = false;
   for (int i = 0; i < kNumMessagesPerApp * 2; ++i) {
     mcs_proto::DataMessageStanza message;
     message.set_from(kAppName);
     message.set_category(kCategoryName);
     // Because all adds are failing, none should hit the per-app message limits.
     EXPECT_TRUE(gcm_store->AddOutgoingMessage(
                     base::IntToString(i),
                     MCSMessage(message),
                     base::Bind(&GCMStoreImplTest::UpdateCallback,
                                base::Unretained(this))));
     PumpLoop();
   }
 }
 
 TEST_F(GCMStoreImplTest, ReloadAfterClose) {
-  scoped_ptr<GCMStore> gcm_store(BuildGCMStore());
+  scoped_ptr<GCMStoreImpl> gcm_store(BuildGCMStore());
   scoped_ptr<GCMStore::LoadResult> load_result;
-  gcm_store->Load(base::Bind(&GCMStoreImplTest::LoadCallback,
-                             base::Unretained(this),
-                             &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   gcm_store->Close();
   PumpLoop();
 
-  gcm_store->Load(base::Bind(&GCMStoreImplTest::LoadCallback,
-                             base::Unretained(this),
-                             &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 }
 
 TEST_F(GCMStoreImplTest, LastTokenFetchTime) {
   scoped_ptr<GCMStoreImpl> gcm_store(BuildGCMStore());
   scoped_ptr<GCMStore::LoadResult> load_result;
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
   EXPECT_EQ(base::Time(), load_result->last_token_fetch_time);
 
   base::Time last_token_fetch_time = base::Time::Now();
   gcm_store->SetLastTokenFetchTime(
       last_token_fetch_time,
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
 
   gcm_store = BuildGCMStore().Pass();
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
   EXPECT_EQ(last_token_fetch_time, load_result->last_token_fetch_time);
 
   // Negative cases, where the value read is gibberish.
   gcm_store->SetValueForTesting(
       "last_token_fetch_time",
       "gibberish",
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
 
   gcm_store = BuildGCMStore().Pass();
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
   EXPECT_EQ(base::Time(), load_result->last_token_fetch_time);
 }
 
 TEST_F(GCMStoreImplTest, InstanceIDData) {
-  scoped_ptr<GCMStore> gcm_store(BuildGCMStore());
+  scoped_ptr<GCMStoreImpl> gcm_store(BuildGCMStore());
   scoped_ptr<GCMStore::LoadResult> load_result;
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   std::string instance_id_data("Foo");
   gcm_store->AddInstanceIDData(
       kAppName,
       instance_id_data,
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
 
   std::string instance_id_data2("Hello Instance ID");
   gcm_store->AddInstanceIDData(
       kAppName2,
       instance_id_data2,
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
 
   gcm_store = BuildGCMStore().Pass();
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   ASSERT_EQ(2u, load_result->instance_id_data.size());
   ASSERT_TRUE(load_result->instance_id_data.find(kAppName) !=
               load_result->instance_id_data.end());
   ASSERT_TRUE(load_result->instance_id_data.find(kAppName2) !=
               load_result->instance_id_data.end());
   EXPECT_EQ(instance_id_data, load_result->instance_id_data[kAppName]);
   EXPECT_EQ(instance_id_data2, load_result->instance_id_data[kAppName2]);
 
   gcm_store->RemoveInstanceIDData(
       kAppName,
       base::Bind(&GCMStoreImplTest::UpdateCallback, base::Unretained(this)));
   PumpLoop();
 
   gcm_store = BuildGCMStore().Pass();
-  gcm_store->Load(base::Bind(
-      &GCMStoreImplTest::LoadCallback, base::Unretained(this), &load_result));
-  PumpLoop();
+  LoadGCMStore(gcm_store.get(), &load_result);
 
   ASSERT_EQ(1u, load_result->instance_id_data.size());
   ASSERT_TRUE(load_result->instance_id_data.find(kAppName2) !=
               load_result->instance_id_data.end());
   EXPECT_EQ(instance_id_data2, load_result->instance_id_data[kAppName2]);
 }
 
 }  // namespace
 
 }  // namespace gcm