Clear GCMProfileService::account_id_ when signing out

chrome/browser/services/gcm/gcm_profile_service_unittest.cc

Index: chrome/browser/services/gcm/gcm_profile_service_unittest.cc
diff --git a/chrome/browser/services/gcm/gcm_profile_service_unittest.cc b/chrome/browser/services/gcm/gcm_profile_service_unittest.cc
index 2b1e5014642e4cb160de5395474d9526bbf58e12..3d77031d2a30d9821412203258727f4d6a94cb27 100644
--- a/chrome/browser/services/gcm/gcm_profile_service_unittest.cc
+++ b/chrome/browser/services/gcm/gcm_profile_service_unittest.cc
@@ -61,6 +61,7 @@ class GCMProfileServiceTest : public testing::Test {
 
   void CreateGCMProfileService();
   void SignIn();
+  void SignOut();
 
   void RegisterAndWaitForCompletion(const std::vector<std::string>& sender_ids);
   void UnregisterAndWaitForCompletion();
@@ -141,6 +142,13 @@ void GCMProfileServiceTest::SignIn() {
   base::RunLoop().RunUntilIdle();
 }
 
+void GCMProfileServiceTest::SignOut() {
+  FakeSigninManager* signin_manager = static_cast<FakeSigninManager*>(
+      SigninManagerFactory::GetInstance()->GetForProfile(profile_.get()));
+  signin_manager->SignOut(signin_metrics::SIGNOUT_TEST);
+  base::RunLoop().RunUntilIdle();
+}
+
 void GCMProfileServiceTest::RegisterAndWaitForCompletion(
     const std::vector<std::string>& sender_ids) {
   base::RunLoop run_loop;
@@ -218,6 +226,18 @@ TEST_F(GCMProfileServiceTest, CreateGCMProfileServiceAfterSignIn) {
   EXPECT_TRUE(driver()->IsStarted());
 }
 
+TEST_F(GCMProfileServiceTest, SignInAgain) {
+  CreateGCMProfileService();
+  SignIn();
+  EXPECT_TRUE(driver()->IsStarted());
+
+  SignOut();
+  EXPECT_FALSE(driver()->IsStarted());
+
+  SignIn();
+  EXPECT_TRUE(driver()->IsStarted());
+}
+
 TEST_F(GCMProfileServiceTest, RegisterAndUnregister) {
   CreateGCMProfileService();
   SignIn();