Fixed app launcher crashing trying to load guest profile.

chrome/browser/ui/app_list/app_list_service_unittest.cc

 // Copyright 2013 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 "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/pref_service_factory.h"
@@ skipping 150 matching lines @@
   base::FilePath last_used_profile_path =
       user_data_dir_.AppendASCII("last-used");
   EXPECT_EQ(last_used_profile_path,
             service_->GetProfilePath(profile_store_->GetUserDataDir()));
 
   // For this test, the AppListViewDelegate is not created because the
   // app list is never shown, so there is nothing to destroy.
   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,
+      base::FilePath(chrome::kGuestProfileDir).MaybeAsASCII());
+  local_state_->SetString(prefs::kProfileLastUsed, "last-used");
+  base::FilePath last_used_profile_path =
+      user_data_dir_.AppendASCII("last-used");
+  EXPECT_EQ(last_used_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,
+      base::FilePath(chrome::kGuestProfileDir).MaybeAsASCII());
+  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());
   EnableAppList();
   service_->SetProfilePath(profile2_->GetPath());
   service_->Show();
   EXPECT_EQ(profile2_.get(), service_->showing_for_profile());
   EXPECT_EQ(profile2_->GetPath(),
             service_->GetProfilePath(profile_store_->GetUserDataDir()));
   service_->SetProfilePath(profile1_->GetPath());
@@ skipping 59 matching lines @@
   EXPECT_EQ(AppListService::ENABLE_FOR_APP_INSTALL,
             local_state_->GetInteger(prefs::kAppListEnableMethod));
   EXPECT_NE(0, local_state_->GetInt64(prefs::kAppListEnableTime));
 
   // An auto-show here should update the enable method to prevent recording it
   // as ENABLE_FOR_APP_INSTALL.
   service_->ShowForAppInstall(profile1_.get(), "", false);
   EXPECT_EQ(AppListService::ENABLE_SHOWN_UNDISCOVERED,
             local_state_->GetInteger(prefs::kAppListEnableMethod));
 }