Fixed app launcher crashing trying to load guest profile.

chrome/browser/ui/app_list/app_list_service_unittest.cc

Index: chrome/browser/ui/app_list/app_list_service_unittest.cc
diff --git a/chrome/browser/ui/app_list/app_list_service_unittest.cc b/chrome/browser/ui/app_list/app_list_service_unittest.cc
index 7b342d0dfe9dacad83924fd4b1549ebc615dab31..d13add43a3c3154601b28f6440cd0f06ca760c1b 100644
--- a/chrome/browser/ui/app_list/app_list_service_unittest.cc
+++ b/chrome/browser/ui/app_list/app_list_service_unittest.cc
@@ -162,6 +162,26 @@ TEST_F(AppListServiceUnitTest,
   EXPECT_EQ(0, service_->destroy_app_list_call_count());
 }
 
+TEST_F(AppListServiceUnitTest, RefusesToLoadGuestAppListProfile) {
+  // Unlikely, but if somehow the user's app_list.profile pref was set to the
+  // guest profile, make sure we refuse to load it (or it would crash).
+  local_state_->SetString(prefs::kAppListProfile, chrome::kGuestProfileDir);
+  local_state_->SetString(prefs::kProfileLastUsed, "last-used");
+  base::FilePath initial_profile_path = user_data_dir_.AppendASCII("last-used");
+  EXPECT_EQ(initial_profile_path,
+            service_->GetProfilePath(profile_store_->GetUserDataDir()));
+}
+
+TEST_F(AppListServiceUnitTest, RefusesToLoadGuestLastUsedProfile) {
+  // If the user's most recent browser session was a guest session, make sure we
+  // do not open a guest profile in the launcher (which would crash).
+  local_state_->SetString(prefs::kProfileLastUsed, chrome::kGuestProfileDir);
+  base::FilePath initial_profile_path =
+      user_data_dir_.AppendASCII(chrome::kInitialProfile);
+  EXPECT_EQ(initial_profile_path,
+            service_->GetProfilePath(profile_store_->GetUserDataDir()));
+}
+
 TEST_F(AppListServiceUnitTest, SwitchingProfilesPersists) {
   profile_store_->LoadProfile(profile1_.get());
   profile_store_->LoadProfile(profile2_.get());