Add support to Google Update wrappers for the "automatic updates only" group policy setting.

chrome/installer/util/google_update_settings_unittest.cc

 // Copyright (c) 2012 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 <windows.h>
 #include <shlwapi.h>  // For SHDeleteKey.
 
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/test/test_reg_util_win.h"
@@ skipping 526 matching lines @@
   EXPECT_EQ(ERROR_SUCCESS,
             RegKey(HKEY_LOCAL_MACHINE, kGoogleUpdatePoliciesKey,
                    KEY_SET_VALUE).WriteValue(kGoogleUpdateUpdateDefault,
                                              static_cast<DWORD>(2)));
   is_overridden = true;
   EXPECT_EQ(GoogleUpdateSettings::MANUAL_UPDATES_ONLY,
             GoogleUpdateSettings::GetAppUpdatePolicy(kTestProductGuid,
                                                      &is_overridden));
   EXPECT_FALSE(is_overridden);
 
+  EXPECT_EQ(ERROR_SUCCESS,
+            RegKey(HKEY_LOCAL_MACHINE, kGoogleUpdatePoliciesKey,
+                   KEY_SET_VALUE).WriteValue(kGoogleUpdateUpdateDefault,
+                                             static_cast<DWORD>(3)));
+  is_overridden = true;
+  EXPECT_EQ(GoogleUpdateSettings::AUTO_UPDATES_ONLY,
+            GoogleUpdateSettings::GetAppUpdatePolicy(kTestProductGuid,
+                                                     &is_overridden));
+  EXPECT_FALSE(is_overridden);
+
   // The default policy should be in force for bogus values.
   EXPECT_EQ(ERROR_SUCCESS,
             RegKey(HKEY_LOCAL_MACHINE, kGoogleUpdatePoliciesKey,
                    KEY_SET_VALUE).WriteValue(kGoogleUpdateUpdateDefault,
-                                             static_cast<DWORD>(3)));
+                                             static_cast<DWORD>(4)));
   is_overridden = true;
   EXPECT_EQ(kDefaultUpdatePolicy,
             GoogleUpdateSettings::GetAppUpdatePolicy(kTestProductGuid,
                                                      &is_overridden));
   EXPECT_FALSE(is_overridden);
 }
 
 // Test that an app-specific override is used if present.
 TEST_F(GoogleUpdateSettingsTest, GetAppUpdatePolicyAppOverride) {
   std::wstring app_policy_value(kGoogleUpdateUpdatePrefix);
@@ skipping 30 matching lines @@
   EXPECT_EQ(ERROR_SUCCESS,
             RegKey(HKEY_LOCAL_MACHINE, kGoogleUpdatePoliciesKey,
                    KEY_SET_VALUE).WriteValue(app_policy_value.c_str(),
                                              static_cast<DWORD>(2)));
   is_overridden = false;
   EXPECT_EQ(GoogleUpdateSettings::MANUAL_UPDATES_ONLY,
             GoogleUpdateSettings::GetAppUpdatePolicy(kTestProductGuid,
                                                      &is_overridden));
   EXPECT_TRUE(is_overridden);
 
+  EXPECT_EQ(ERROR_SUCCESS,
+            RegKey(HKEY_LOCAL_MACHINE, kGoogleUpdatePoliciesKey,
+                   KEY_SET_VALUE).WriteValue(app_policy_value.c_str(),
+                                             static_cast<DWORD>(3)));
+  is_overridden = false;
+  EXPECT_EQ(GoogleUpdateSettings::AUTO_UPDATES_ONLY,
+            GoogleUpdateSettings::GetAppUpdatePolicy(kTestProductGuid,
+                                                     &is_overridden));
+  EXPECT_TRUE(is_overridden);
+
   // The default policy should be in force for bogus values.
   EXPECT_EQ(ERROR_SUCCESS,
             RegKey(HKEY_LOCAL_MACHINE, kGoogleUpdatePoliciesKey,
                    KEY_SET_VALUE).WriteValue(app_policy_value.c_str(),
-                                             static_cast<DWORD>(3)));
+                                             static_cast<DWORD>(4)));
   is_overridden = true;
   EXPECT_EQ(GoogleUpdateSettings::UPDATES_DISABLED,
             GoogleUpdateSettings::GetAppUpdatePolicy(kTestProductGuid,
                                                      &is_overridden));
   EXPECT_FALSE(is_overridden);
 }
 
 TEST_F(GoogleUpdateSettingsTest, ExperimentsLabelHelperSystem) {
   TestExperimentsLabelHelper(SYSTEM_INSTALL);
 }
@@ skipping 378 matching lines @@
         StatsState(StatsState::kSystemLevel, StatsState::MULTI_INSTALL,
                    StatsState::FALSE_SETTING, StatsState::FALSE_SETTING),
         StatsState(StatsState::kSystemLevel, StatsState::MULTI_INSTALL,
                    StatsState::FALSE_SETTING, StatsState::TRUE_SETTING),
         StatsState(StatsState::kSystemLevel, StatsState::MULTI_INSTALL,
                    StatsState::TRUE_SETTING, StatsState::NO_SETTING),
         StatsState(StatsState::kSystemLevel, StatsState::MULTI_INSTALL,
                    StatsState::TRUE_SETTING, StatsState::FALSE_SETTING),
         StatsState(StatsState::kSystemLevel, StatsState::MULTI_INSTALL,
                    StatsState::TRUE_SETTING, StatsState::TRUE_SETTING)));