ConfigurationPolicyPrefStore refactoring to surface error messages.

chrome/browser/policy/configuration_policy_handler.cc

Index: chrome/browser/policy/configuration_policy_handler.cc
diff --git a/chrome/browser/policy/configuration_policy_handler.cc b/chrome/browser/policy/configuration_policy_handler.cc
new file mode 100644
index 0000000000000000000000000000000000000000..82b3f0c21ee8a43beceb12c884cf0c5933fdf9fb
--- /dev/null
+++ b/chrome/browser/policy/configuration_policy_handler.cc
@@ -0,0 +1,806 @@
+// Copyright (c) 2011 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 "chrome/browser/policy/configuration_policy_handler.h"
+
+#include <vector>
+
+#include "base/file_path.h"
+#include "base/logging.h"
+#include "base/stl_util.h"
+#include "base/string16.h"
+#include "base/string_number_conversions.h"
+#include "base/string_util.cc"
+#include "base/utf_string_conversions.h"
+#include "chrome/browser/download/download_util.h"
+#include "chrome/browser/policy/configuration_policy_handler_list.h"
+#include "chrome/browser/policy/configuration_policy_pref_store.h"
+#include "chrome/browser/policy/policy_path_parser.h"
+#include "chrome/browser/prefs/proxy_config_dictionary.h"
+#include "chrome/browser/prefs/proxy_prefs.h"
+#include "chrome/browser/search_engines/search_terms_data.h"
+#include "chrome/browser/search_engines/template_url.h"
+#include "chrome/common/pref_names.h"
+#include "grit/generated_resources.h"
+
+namespace policy {
+
+namespace {
+
+std::string ValueTypeToString(Value::Type type) {
+  static const char* strings[] = { "null",
+                                   "boolean",
+                                   "integer",
+                                   "double",
+                                   "string",
+                                   "binary",
+                                   "dictionary",
+                                   "list" };
+  DCHECK(static_cast<size_t>(type) < arraysize(strings));
+  return std::string(strings[type]);
+}
+
+const PolicyToPreferenceMapEntry kDefaultSearchPolicyMap[] = {
+  { Value::TYPE_BOOLEAN, kPolicyDefaultSearchProviderEnabled,
+    prefs::kDefaultSearchProviderEnabled },
+  { Value::TYPE_STRING, kPolicyDefaultSearchProviderName,
+    prefs::kDefaultSearchProviderName },
+  { Value::TYPE_STRING, kPolicyDefaultSearchProviderKeyword,
+    prefs::kDefaultSearchProviderKeyword },
+  { Value::TYPE_STRING, kPolicyDefaultSearchProviderSearchURL,
+    prefs::kDefaultSearchProviderSearchURL },
+  { Value::TYPE_STRING, kPolicyDefaultSearchProviderSuggestURL,
+    prefs::kDefaultSearchProviderSuggestURL },
+  { Value::TYPE_STRING, kPolicyDefaultSearchProviderInstantURL,
+    prefs::kDefaultSearchProviderInstantURL },
+  { Value::TYPE_STRING, kPolicyDefaultSearchProviderIconURL,
+    prefs::kDefaultSearchProviderIconURL },
+  { Value::TYPE_LIST, kPolicyDefaultSearchProviderEncodings,
+    prefs::kDefaultSearchProviderEncodings },
+};
+
+// Implementation of SearchTermsData just for validation.
+class SearchTermsDataForValidation : public SearchTermsData {
+ public:
+  SearchTermsDataForValidation() {}
+
+  // Implementation of SearchTermsData.
+  virtual std::string GoogleBaseURLValue() const {
+    return "http://www.google.com/";
+  }
+  virtual std::string GetApplicationLocale() const {
+    return "en";
+  }
+#if defined(OS_WIN) && defined(GOOGLE_CHROME_BUILD)
+  virtual string16 GetRlzParameterValue() const {
+    return string16();
+  }
+#endif
+ private:
+  DISALLOW_COPY_AND_ASSIGN(SearchTermsDataForValidation);
+};
+
+// This is used to check whether for a given ProxyMode value, the ProxyPacUrl,
+// the ProxyBypassList and the ProxyServer policies are allowed to be specified.
+// |error_message_id| is the message id of the localized error message to show
+// when the policies are not specified as allowed. Each value of ProxyMode
+// has a ProxyModeValidationEntry in the kProxyModeValidationMap below.
+struct ProxyModeValidationEntry {
+  std::string mode_value;
+  bool pac_url_allowed;
+  bool bypass_list_allowed;
+  bool server_allowed;
+  int error_message_id;
+};
+
+const ProxyModeValidationEntry kProxyModeValidationMap[] = {
+  { ProxyPrefs::kDirectProxyModeName,
+    false, false, false, IDS_POLICY_PROXY_MODE_DISABLED_ERROR },
+  { ProxyPrefs::kAutoDetectProxyModeName,
+    false, false, false, IDS_POLICY_PROXY_MODE_AUTO_DETECT_ERROR },
+  { ProxyPrefs::kPacScriptProxyModeName,
+    true, false, false, IDS_POLICY_PROXY_MODE_PAC_URL_ERROR },
+  { ProxyPrefs::kFixedServersProxyModeName,
+    false, true, true, IDS_POLICY_PROXY_MODE_FIXED_SERVERS_ERROR },
+  { ProxyPrefs::kSystemProxyModeName,
+    false, false, false, IDS_POLICY_PROXY_MODE_SYSTEM_ERROR },
+};
+
+}  // namespace
+
+// TypeCheckingPolicyHandler
+TypeCheckingPolicyHandler::TypeCheckingPolicyHandler(
+    ConfigurationPolicyType policy,
+    Value::Type value_type)
+    : policy_type_(policy),
+      value_type_(value_type) {
+}
+
+TypeCheckingPolicyHandler::~TypeCheckingPolicyHandler() {
+}
+
+ConfigurationPolicyType TypeCheckingPolicyHandler::policy_type() const {
+  return policy_type_;
+}
+
+bool TypeCheckingPolicyHandler::CheckPolicySettings(const PolicyMap* policies,
+                                                    PolicyErrorMap* errors) {
+  const Value* value = policies->Get(policy_type_);
+  if (value && value_type_ != value->GetType()) {
+    errors->AddError(policy_type_,
+                     IDS_POLICY_TYPE_ERROR, ValueTypeToString(value_type_));
+    return false;
+  }
+  return true;
+}
+
+// SimplePolicyHandler
+SimplePolicyHandler::SimplePolicyHandler(
+    ConfigurationPolicyType policy,
+    Value::Type value_type,
+    const char* pref_path)
+    : TypeCheckingPolicyHandler(policy, value_type),
+      pref_path_(pref_path) {
+}
+
+SimplePolicyHandler::~SimplePolicyHandler() {
+}
+
+void SimplePolicyHandler::ApplyPolicySettings(const PolicyMap* policies,
+                                              PrefValueMap* prefs) {
+  const Value* value = policies->Get(policy_type());
+  if (value)
+    prefs->SetValue(pref_path_, value->DeepCopy());
+}
+
+// SyncPolicyHandler
+SyncPolicyHandler::SyncPolicyHandler()
+    : TypeCheckingPolicyHandler(kPolicySyncDisabled,
+                                Value::TYPE_BOOLEAN) {
+}
+
+SyncPolicyHandler::~SyncPolicyHandler() {
+}
+
+void SyncPolicyHandler::ApplyPolicySettings(const PolicyMap* policies,
+                                            PrefValueMap* prefs) {
+  const Value* value = policies->Get(policy_type());
+  bool disable_sync;
+  if (value && value->GetAsBoolean(&disable_sync) && disable_sync)
+    prefs->SetValue(prefs::kSyncManaged, value->DeepCopy());
+}
+
+// AutofillPolicyHandler
+AutofillPolicyHandler::AutofillPolicyHandler()
+    : TypeCheckingPolicyHandler(kPolicyAutoFillEnabled,
+                                Value::TYPE_BOOLEAN) {
+}
+
+AutofillPolicyHandler::~AutofillPolicyHandler() {
+}
+
+void AutofillPolicyHandler::ApplyPolicySettings(const PolicyMap* policies,
+                                                PrefValueMap* prefs) {
+  const Value* value = policies->Get(policy_type());
+  bool auto_fill_enabled;
+  if (value && value->GetAsBoolean(&auto_fill_enabled) && !auto_fill_enabled) {
+    prefs->SetValue(prefs::kAutofillEnabled,
+                    Value::CreateBooleanValue(false));
+  }
+}
+
+// DownloadDirPolicyHandler
+DownloadDirPolicyHandler::DownloadDirPolicyHandler()
+    : TypeCheckingPolicyHandler(kPolicyDownloadDirectory,
+                                Value::TYPE_STRING) {
+}
+
+DownloadDirPolicyHandler::~DownloadDirPolicyHandler() {
+}
+
+void DownloadDirPolicyHandler::ApplyPolicySettings(const PolicyMap* policies,
+                                                   PrefValueMap* prefs) {
+  const Value* value = policies->Get(policy_type());
+  FilePath::StringType string_value;
+  if (!value || !value->GetAsString(&string_value))
+    return;
+
+  FilePath::StringType expanded_value =
+      policy::path_parser::ExpandPathVariables(string_value);
+  // Leaving the policy empty would revert to the default download location
+  // else we would point in an undefined location. We do this after the
+  // path expansion because it might lead to an empty string(e.g. for "\"\"").
+  if (expanded_value.empty())
+    expanded_value = download_util::GetDefaultDownloadDirectory().value();
+  prefs->SetValue(prefs::kDownloadDefaultDirectory,
+                  Value::CreateStringValue(expanded_value));
+  prefs->SetValue(prefs::kPromptForDownload,
+                  Value::CreateBooleanValue(false));
+}
+
+// DiskCacheDirPolicyHandler
+DiskCacheDirPolicyHandler::DiskCacheDirPolicyHandler()
+    : TypeCheckingPolicyHandler(kPolicyDiskCacheDir,
+                                Value::TYPE_STRING) {
+}
+
+DiskCacheDirPolicyHandler::~DiskCacheDirPolicyHandler() {
+}
+
+void DiskCacheDirPolicyHandler::ApplyPolicySettings(const PolicyMap* policies,
+                                                    PrefValueMap* prefs) {
+  const Value* value = policies->Get(policy_type());
+  FilePath::StringType string_value;
+  if (value && value->GetAsString(&string_value)) {
+    FilePath::StringType expanded_value =
+        policy::path_parser::ExpandPathVariables(string_value);
+    prefs->SetValue(prefs::kDiskCacheDir,
+                    Value::CreateStringValue(expanded_value));
+  }
+}
+
+// FileSelectionDialogsHandler
+FileSelectionDialogsHandler::FileSelectionDialogsHandler()
+    : TypeCheckingPolicyHandler(kPolicyAllowFileSelectionDialogs,
+                                Value::TYPE_BOOLEAN) {
+}
+
+FileSelectionDialogsHandler::~FileSelectionDialogsHandler() {
+}
+
+void FileSelectionDialogsHandler::ApplyPolicySettings(const PolicyMap* policies,
+                                                      PrefValueMap* prefs) {
+  const Value* value = policies->Get(policy_type());
+  if (!value)
+    return;
+
+  prefs->SetValue(prefs::kAllowFileSelectionDialogs, value->DeepCopy());
+  // If file-selection dialogs are not allowed we forbid the user to be
+  // prompted for the download location, since this would end up in an Infobar
+  // explaining that file-selection dialogs are forbidden anyways.
+  bool allow_file_selection_dialogs = true;
+  if (value->GetAsBoolean(&allow_file_selection_dialogs) &&
+      !allow_file_selection_dialogs) {
+    prefs->SetValue(prefs::kPromptForDownload,
+                    Value::CreateBooleanValue(false));
+  }
+}
+
+// BookmarksPolicyHandler
+BookmarksPolicyHandler::BookmarksPolicyHandler()
+    : TypeCheckingPolicyHandler(kPolicyBookmarkBarEnabled,
+                                Value::TYPE_BOOLEAN) {
+}
+
+BookmarksPolicyHandler::~BookmarksPolicyHandler() {
+}
+
+void BookmarksPolicyHandler::ApplyPolicySettings(const PolicyMap* policies,
+                                                 PrefValueMap* prefs) {
+  const Value* value = policies->Get(policy_type());
+  if (!value)
+    return;
+
+  prefs->SetValue(prefs::kEnableBookmarkBar, value->DeepCopy());
+  // kShowBookmarkBar is not managed directly by a policy, but when
+  // kEnableBookmarkBar is managed, kShowBookmarkBar should be false so that
+  // the bookmarks bar either is completely disabled or only shows on the NTP.
+  // This also disables the checkbox for this preference in the prefs UI.
+  prefs->SetValue(prefs::kShowBookmarkBar, Value::CreateBooleanValue(false));
+}
+
+// IncognitoModePolicyHandler
+IncognitoModePolicyHandler::IncognitoModePolicyHandler() {
+}
+
+IncognitoModePolicyHandler::~IncognitoModePolicyHandler() {
+}
+
+bool IncognitoModePolicyHandler::CheckPolicySettings(const PolicyMap* policies,
+                                                     PolicyErrorMap* errors) {
+  int int_value = IncognitoModePrefs::ENABLED;
+  const Value* availability = policies->Get(kPolicyIncognitoModeAvailability);
+
+  if (availability) {
+    if (availability->GetAsInteger(&int_value)) {
+      IncognitoModePrefs::Availability availability_enum_value;
+      if (!IncognitoModePrefs::IntToAvailability(int_value,
+                                                 &availability_enum_value)) {
+        errors->AddError(kPolicyIncognitoModeAvailability,
+                         IDS_POLICY_OUT_OF_RANGE_ERROR,
+                         base::IntToString(int_value));
+        return false;
+      }
+    } else {
+      errors->AddError(kPolicyIncognitoModeAvailability,
+                       IDS_POLICY_TYPE_ERROR,
+                       ValueTypeToString(Value::TYPE_INTEGER));
+      return false;
+    }
+  } else {
+    const Value* deprecated_enabled = policies->Get(kPolicyIncognitoEnabled);
+    // If kPolicyIncognitoModeAvailability is not specified, check the obsolete
+    // kPolicyIncognitoEnabled.
+    if (deprecated_enabled &&
+        !deprecated_enabled->IsType(Value::TYPE_BOOLEAN)) {
+      errors->AddError(kPolicyIncognitoEnabled,
+                       IDS_POLICY_TYPE_ERROR,
+                       ValueTypeToString(Value::TYPE_BOOLEAN));
+      return false;
+    }
+  }
+  return true;
+}
+
+void IncognitoModePolicyHandler::ApplyPolicySettings(const PolicyMap* policies,
+                                                     PrefValueMap* prefs) {
+  const Value* availability = policies->Get(kPolicyIncognitoModeAvailability);
+  const Value* deprecated_enabled = policies->Get(kPolicyIncognitoEnabled);
+  if (availability) {
+    int int_value = IncognitoModePrefs::ENABLED;
+    IncognitoModePrefs::Availability availability_enum_value;
+    if (availability->GetAsInteger(&int_value) &&
+        IncognitoModePrefs::IntToAvailability(int_value,
+                                              &availability_enum_value)) {
+      prefs->SetValue(prefs::kIncognitoModeAvailability,
+                      Value::CreateIntegerValue(availability_enum_value));
+    }
+  } else if (deprecated_enabled) {
+    bool enabled = true;
+    if (deprecated_enabled->GetAsBoolean(&enabled)) {
+      prefs->SetInteger(prefs::kIncognitoModeAvailability,
+                        enabled ? IncognitoModePrefs::ENABLED :
+                                  IncognitoModePrefs::DISABLED);
+    }
+  }
+}
+
+// DefaultSearchEncodingsPolicyHandler
+DefaultSearchEncodingsPolicyHandler::DefaultSearchEncodingsPolicyHandler()
+    : TypeCheckingPolicyHandler(kPolicyDefaultSearchProviderEncodings,
+                                Value::TYPE_LIST) {
+}
+
+DefaultSearchEncodingsPolicyHandler::~DefaultSearchEncodingsPolicyHandler() {
+}
+
+void DefaultSearchEncodingsPolicyHandler::ApplyPolicySettings(
+    const PolicyMap* policies, PrefValueMap* prefs) {
+  const Value* value = policies->Get(policy_type());
+  const ListValue* list;
+  if (!value || !value->GetAsList(&list))
+    return;
+
+  ListValue::const_iterator iter(list->begin());
+  ListValue::const_iterator end(list->end());
+  std::vector<std::string> string_parts;
+  for (; iter != end; ++iter) {
+    std::string s;
+    if ((*iter)->GetAsString(&s)) {
+      string_parts.push_back(s);
+    } else {
+      NOTREACHED();
+    }
+  }
+  std::string encodings = JoinString(string_parts, ';');
+  prefs->SetValue(prefs::kDefaultSearchProviderEncodings,
+                  Value::CreateStringValue(encodings));
+}
+
+// DefaultSearchPolicyHandler
+DefaultSearchPolicyHandler::DefaultSearchPolicyHandler() {
+  for (size_t current = 0;
+       current < arraysize(kDefaultSearchPolicyMap); ++current) {
+    ConfigurationPolicyType policy_type =
+        kDefaultSearchPolicyMap[current].policy_type;
+    if (policy_type != kPolicyDefaultSearchProviderEncodings) {
+      handlers_.push_back(
+          new SimplePolicyHandler(
+              policy_type,
+              kDefaultSearchPolicyMap[current].value_type,
+              kDefaultSearchPolicyMap[current].preference_path));
+    } else {
+      handlers_.push_back(new DefaultSearchEncodingsPolicyHandler());
+    }
+  }
+}
+
+DefaultSearchPolicyHandler::~DefaultSearchPolicyHandler() {
+  STLDeleteContainerPointers(handlers_.begin(), handlers_.end());
+  handlers_.clear();
+}
+
+bool DefaultSearchPolicyHandler::CheckPolicySettings(const PolicyMap* policies,
+                                                     PolicyErrorMap* errors) {
+  if (!CheckIndividualPolicies(policies, errors))
+    return false;
+
+  if (DefaultSearchProviderIsDisabled(policies)) {
+    // Add an error for all specified default search policies except
+    // DefaultSearchProviderEnabled.
+    int message_id = IDS_POLICY_DEFAULT_SEARCH_DISABLED;
+    for (size_t current = 0;
+         current < arraysize(kDefaultSearchPolicyMap); ++current) {
+      ConfigurationPolicyType policy_type =
+          kDefaultSearchPolicyMap[current].policy_type;
+      if (policy_type != kPolicyDefaultSearchProviderEnabled &&
+          HasDefaultSearchPolicy(policies, policy_type)) {
+        errors->AddError(policy_type, message_id);
+      }
+    }
+    return true;
+  }
+
+  const Value* search_url =
+      policies->Get(kPolicyDefaultSearchProviderSearchURL);
+  if (!search_url && AnyDefaultSearchPoliciesSpecified(policies)) {
+      errors->AddError(kPolicyDefaultSearchProviderSearchURL,

[Mattias Nissler (ping if slow), 2011/09/30 13:33:35]

Indentation

+                       IDS_POLICY_NOT_SPECIFIED_ERROR);
+    return false;
+  }
+
+  if (search_url && !DefaultSearchURLIsValid(policies)) {
+    errors->AddError(kPolicyDefaultSearchProviderSearchURL,
+                     IDS_POLICY_INVALID_SEARCH_URL_ERROR);
+    return false;
+  }
+  return true;
+}
+
+void DefaultSearchPolicyHandler::ApplyPolicySettings(const PolicyMap* policies,
+                                                     PrefValueMap* prefs) {
+  if (DefaultSearchProviderIsDisabled(policies)) {
+    // If default search is disabled, we ignore the other fields.
+    prefs->SetString(prefs::kDefaultSearchProviderName, std::string());
+    prefs->SetString(prefs::kDefaultSearchProviderSearchURL, std::string());
+    prefs->SetString(prefs::kDefaultSearchProviderSuggestURL, std::string());
+    prefs->SetString(prefs::kDefaultSearchProviderIconURL, std::string());
+    prefs->SetString(prefs::kDefaultSearchProviderEncodings, std::string());
+    prefs->SetString(prefs::kDefaultSearchProviderKeyword, std::string());
+    prefs->SetString(prefs::kDefaultSearchProviderInstantURL, std::string());
+    return;
+  }
+
+  const Value* search_url =
+      policies->Get(kPolicyDefaultSearchProviderSearchURL);
+  // The search URL is required.
+  if (!search_url)
+    return;
+
+  // The other entries are optional.  Just make sure that they are all
+  // specified via policy, so that we don't use regular prefs.
+  if (DefaultSearchURLIsValid(policies)) {
+
+    // Apply all default search policies.
+    PrefValueMap tmp_prefs;
+    HandlerList::const_iterator handler = handlers_.begin();
+    for ( ; handler != handlers_.end(); ++handler)
+      (*handler)->ApplyPolicySettings(policies, &tmp_prefs);
+
+    EnsureStringPrefExists(&tmp_prefs, prefs::kDefaultSearchProviderSuggestURL);
+    EnsureStringPrefExists(&tmp_prefs, prefs::kDefaultSearchProviderIconURL);
+    EnsureStringPrefExists(&tmp_prefs, prefs::kDefaultSearchProviderEncodings);
+    EnsureStringPrefExists(&tmp_prefs, prefs::kDefaultSearchProviderKeyword);
+    EnsureStringPrefExists(&tmp_prefs, prefs::kDefaultSearchProviderInstantURL);
+
+    // For the name, default to the host if not specified.
+    std::string name;
+    if (!tmp_prefs.GetString(prefs::kDefaultSearchProviderName, &name) ||
+        name.empty()) {
+      std::string search_url_string;
+      if (search_url->GetAsString(&search_url_string)) {
+        tmp_prefs.SetString(prefs::kDefaultSearchProviderName,
+                             GURL(search_url_string).host());
+      }
+    }
+
+    // And clear the IDs since these are not specified via policy.
+    tmp_prefs.SetString(prefs::kDefaultSearchProviderID, std::string());
+    tmp_prefs.SetString(prefs::kDefaultSearchProviderPrepopulateID,
+                         std::string());
+    prefs->MergeFrom(&tmp_prefs);
+  }
+}
+
+bool DefaultSearchPolicyHandler::CheckIndividualPolicies(
+    const PolicyMap* policies, PolicyErrorMap* errors) {
+  bool ok = true;
+  HandlerList::const_iterator handler = handlers_.begin();
+  for ( ; handler != handlers_.end(); ++handler) {
+    if (!(*handler)->CheckPolicySettings(policies, errors))
+      ok = false;
+  }
+  return ok;
+}
+
+bool DefaultSearchPolicyHandler::HasDefaultSearchPolicy(
+    const PolicyMap* policies, ConfigurationPolicyType policy_type) {
+  return policies->Get(policy_type) ? true : false;
+}
+
+bool DefaultSearchPolicyHandler::AnyDefaultSearchPoliciesSpecified(
+    const PolicyMap* policies) {
+  for (size_t current = 0;
+      current < arraysize(kDefaultSearchPolicyMap); ++current) {
+    if (policies->Get(kDefaultSearchPolicyMap[current].policy_type))
+      return true;
+  }
+  return false;
+}
+
+bool DefaultSearchPolicyHandler::DefaultSearchProviderIsDisabled(
+    const PolicyMap* policies) {
+  const Value* provider_enabled =
+      policies->Get(kPolicyDefaultSearchProviderEnabled);
+  bool enabled = true;
+  return provider_enabled &&
+         provider_enabled->GetAsBoolean(&enabled) &&
+         !enabled;
+}
+
+bool DefaultSearchPolicyHandler::DefaultSearchURLIsValid(
+    const PolicyMap* policies) {
+  const Value* search_url =
+      policies->Get(kPolicyDefaultSearchProviderSearchURL);
+  if (!search_url)
+    return true;
+
+  std::string search_url_string;
+  if (search_url->GetAsString(&search_url_string)) {
+    SearchTermsDataForValidation search_terms_data;
+    const TemplateURLRef search_url_ref(search_url_string, 0, 0);
+    // It must support replacement (which implies it is valid).
+    return search_url_ref.SupportsReplacementUsingTermsData(search_terms_data);
+  }
+  return false;
+}
+
+void DefaultSearchPolicyHandler::EnsureStringPrefExists(
+    PrefValueMap* prefs, const std::string& path) {
+  std::string value;
+  if (!prefs->GetString(path, &value))
+    prefs->SetString(path, value);
+}
+
+// ProxyPolicyHandler
+ProxyPolicyHandler::ProxyPolicyHandler() {
+}
+
+ProxyPolicyHandler::~ProxyPolicyHandler() {
+}
+
+bool ProxyPolicyHandler::CheckPolicySettings(const PolicyMap* policies,
+                                             PolicyErrorMap* errors) {
+  const Value* mode = GetProxyPolicyValue(policies, kPolicyProxyMode);
+  const Value* server = GetProxyPolicyValue(policies, kPolicyProxyServer);
+  const Value* server_mode =
+      GetProxyPolicyValue(policies, kPolicyProxyServerMode);
+  const Value* pac_url = GetProxyPolicyValue(policies, kPolicyProxyPacUrl);
+  const Value* bypass_list =
+      GetProxyPolicyValue(policies, kPolicyProxyBypassList);
+
+  if ((server || pac_url || bypass_list) && !(mode || server_mode)) {
+    errors->AddError(kPolicyProxyMode,
+                     IDS_POLICY_NOT_SPECIFIED_ERROR);
+    return false;
+  }
+
+  std::string mode_value;
+  if (!CheckProxyModeAndServerMode(policies, errors, &mode_value))
+    return false;
+
+  // If neither ProxyMode nor ProxyServerMode are specified, mode_value will be
+  // empty and the proxy shouldn't be configured at all.
+  if (mode_value.empty())
+    return true;
+
+  bool is_valid_mode = false;
+  for (size_t current = 0;
+       current != arraysize(kProxyModeValidationMap); ++current) {
+    const ProxyModeValidationEntry& entry = kProxyModeValidationMap[current];
+    if (entry.mode_value != mode_value)
+      continue;
+
+    is_valid_mode = true;
+
+    if (!entry.pac_url_allowed && pac_url)
+      errors->AddError(kPolicyProxyPacUrl, entry.error_message_id);
+    if (!entry.bypass_list_allowed && bypass_list)
+      errors->AddError(kPolicyProxyPacUrl, entry.error_message_id);
+    if (!entry.server_allowed && server)
+      errors->AddError(kPolicyProxyPacUrl, entry.error_message_id);
+
+    if ((!entry.pac_url_allowed && pac_url) ||
+        (!entry.bypass_list_allowed && bypass_list) ||
+        (!entry.server_allowed && server)) {
+      return false;
+    }
+  }
+
+  if (!is_valid_mode) {
+    if (server_mode) {
+      errors->AddError(kPolicyProxyServerMode, IDS_POLICY_OUT_OF_RANGE_ERROR,
+                       mode_value);
+    } else {
+      errors->AddError(kPolicyProxyMode, IDS_POLICY_OUT_OF_RANGE_ERROR,
+                       mode_value);
+    }
+    return false;
+  }
+  return true;
+}
+
+void ProxyPolicyHandler::ApplyPolicySettings(const PolicyMap* policies,
+                                             PrefValueMap* prefs) {
+  const Value* mode = GetProxyPolicyValue(policies, kPolicyProxyMode);
+  const Value* server = GetProxyPolicyValue(policies, kPolicyProxyServer);
+  const Value* server_mode =
+      GetProxyPolicyValue(policies, kPolicyProxyServerMode);
+  const Value* pac_url = GetProxyPolicyValue(policies, kPolicyProxyPacUrl);
+  const Value* bypass_list =
+      GetProxyPolicyValue(policies, kPolicyProxyBypassList);
+
+  ProxyPrefs::ProxyMode proxy_mode;
+  if (mode) {
+    std::string string_mode;
+    if (!mode->GetAsString(&string_mode))
+      return;
+    ProxyPrefs::StringToProxyMode(string_mode, &proxy_mode);
+  } else if (server_mode) {
+    int int_mode = 0;
+    if (!server_mode->GetAsInteger(&int_mode))
+      return;
+
+    switch (int_mode) {
+      case kPolicyNoProxyServerMode:
+        proxy_mode = ProxyPrefs::MODE_DIRECT;
+        break;
+      case kPolicyAutoDetectProxyServerMode:
+        proxy_mode = ProxyPrefs::MODE_AUTO_DETECT;
+        break;
+      case kPolicyManuallyConfiguredProxyServerMode:
+        proxy_mode = ProxyPrefs::MODE_FIXED_SERVERS;
+        if (pac_url)
+          proxy_mode = ProxyPrefs::MODE_PAC_SCRIPT;
+        break;
+      case kPolicyUseSystemProxyServerMode:
+        proxy_mode = ProxyPrefs::MODE_SYSTEM;
+        break;
+      default:
+        proxy_mode = ProxyPrefs::MODE_DIRECT;
+        NOTREACHED();
+    }
+  } else {
+    return;
+  }
+
+  switch (proxy_mode) {
+    case ProxyPrefs::MODE_DIRECT:
+      prefs->SetValue(prefs::kProxy, ProxyConfigDictionary::CreateDirect());
+      break;
+    case ProxyPrefs::MODE_AUTO_DETECT:
+      prefs->SetValue(prefs::kProxy, ProxyConfigDictionary::CreateAutoDetect());
+      break;
+    case ProxyPrefs::MODE_PAC_SCRIPT: {
+      std::string pac_url_string;
+      if (pac_url->GetAsString(&pac_url_string)) {
+        prefs->SetValue(prefs::kProxy,
+            ProxyConfigDictionary::CreatePacScript(pac_url_string, false));
+      }
+      break;
+    }
+    case ProxyPrefs::MODE_FIXED_SERVERS: {
+      std::string proxy_server;
+      std::string bypass_list_string;
+      if (server->GetAsString(&proxy_server) &&
+          bypass_list &&
+          bypass_list->GetAsString(&bypass_list_string)) {
+        prefs->SetValue(prefs::kProxy,
+                        ProxyConfigDictionary::CreateFixedServers(
+                            proxy_server, bypass_list_string));
+      }
+      break;
+    }
+    case ProxyPrefs::MODE_SYSTEM:
+      prefs->SetValue(prefs::kProxy,
+                      ProxyConfigDictionary::CreateSystem());
+      break;
+    case ProxyPrefs::kModeCount:
+      NOTREACHED();
+  }
+}
+
+const Value* ProxyPolicyHandler::GetProxyPolicyValue(
+    const PolicyMap* policies, ConfigurationPolicyType policy) {
+  const Value* value = policies->Get(policy);
+  std::string tmp;
+  if (!value ||
+      value->IsType(Value::TYPE_NULL) ||
+      (value->IsType(Value::TYPE_STRING) &&
+      value->GetAsString(&tmp) &&
+      tmp.empty())) {
+    return NULL;
+  }
+  return value;
+}
+
+bool ProxyPolicyHandler::CheckProxyModeAndServerMode(const PolicyMap* policies,
+                                                     PolicyErrorMap* errors,
+                                                     std::string* mode_value) {
+  const Value* mode = GetProxyPolicyValue(policies, kPolicyProxyMode);
+  const Value* server = GetProxyPolicyValue(policies, kPolicyProxyServer);
+  const Value* server_mode =
+      GetProxyPolicyValue(policies, kPolicyProxyServerMode);
+  const Value* pac_url = GetProxyPolicyValue(policies, kPolicyProxyPacUrl);
+
+  // If there's a server mode, convert it into a mode.
+  if (mode) {
+    if (server_mode) {
+      errors->AddError(kPolicyProxyMode, IDS_POLICY_PROXY_MODE_IGNORED);
+    }
+    if (!mode->GetAsString(mode_value)) {
+      errors->AddError(kPolicyProxyMode, IDS_POLICY_TYPE_ERROR,
+                       ValueTypeToString(Value::TYPE_BOOLEAN));
+      return false;
+    }
+
+    ProxyPrefs::ProxyMode mode;
+    if (!ProxyPrefs::StringToProxyMode(*mode_value, &mode)) {
+      errors->AddError(kPolicyProxyMode, IDS_POLICY_INVALID_PROXY_MODE_ERROR);
+      return false;
+    }
+
+    if (mode == ProxyPrefs::MODE_PAC_SCRIPT && !pac_url) {
+      errors->AddError(kPolicyProxyPacUrl, IDS_POLICY_NOT_SPECIFIED_ERROR);
+      return false;
+    } else if (mode == ProxyPrefs::MODE_FIXED_SERVERS && !server) {
+      errors->AddError(kPolicyProxyServer, IDS_POLICY_NOT_SPECIFIED_ERROR);
+      return false;
+    }
+  } else if (server_mode) {
+    int server_mode_value;
+    if (!server_mode->GetAsInteger(&server_mode_value)) {
+      errors->AddError(kPolicyProxyServerMode, IDS_POLICY_TYPE_ERROR,
+                       ValueTypeToString(Value::TYPE_INTEGER));
+      return false;
+    }
+
+    switch (server_mode_value) {
+      case kPolicyNoProxyServerMode:
+        *mode_value = ProxyPrefs::kDirectProxyModeName;
+        break;
+      case kPolicyAutoDetectProxyServerMode:
+        *mode_value = ProxyPrefs::kAutoDetectProxyModeName;
+        break;
+      case kPolicyManuallyConfiguredProxyServerMode:
+        if (server && pac_url) {
+          int message_id = IDS_POLICY_PROXY_BOTH_SPECIFIED_ERROR;
+          errors->AddError(kPolicyProxyServer, message_id);
+          errors->AddError(kPolicyProxyPacUrl, message_id);
+          return false;
+        }
+        if (!server && !pac_url) {
+          int message_id = IDS_POLICY_PROXY_NEITHER_SPECIFIED_ERROR;
+          errors->AddError(kPolicyProxyServer, message_id);
+          errors->AddError(kPolicyProxyPacUrl, message_id);
+          return false;
+        }
+        if (pac_url)
+          *mode_value = ProxyPrefs::kPacScriptProxyModeName;
+        else
+          *mode_value = ProxyPrefs::kFixedServersProxyModeName;
+        break;
+      case kPolicyUseSystemProxyServerMode:
+        *mode_value = ProxyPrefs::kSystemProxyModeName;
+        break;
+      default:
+        errors->AddError(kPolicyProxyServer, IDS_POLICY_OUT_OF_RANGE_ERROR,
+                         base::IntToString(server_mode_value));
+        return false;
+    }
+  }
+  return true;
+}
+
+}  // namespace policy