Make extensions DSE persistent in browser prefs

chrome/browser/extensions/api/settings_overrides/settings_overrides_api.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 "chrome/browser/extensions/api/settings_overrides/settings_overrides_api.h"
 
 #include <stddef.h>
+#include <memory>
 #include <utility>
 
 #include "base/lazy_instance.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/extensions/api/preference/preference_api.h"
 #include "chrome/browser/prefs/session_startup_pref.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search_engines/template_url_service_factory.h"
 #include "chrome/common/extensions/manifest_handlers/settings_overrides_handler.h"
 #include "chrome/common/pref_names.h"
 #include "components/search_engines/search_engines_pref_names.h"
 #include "components/search_engines/template_url.h"
+#include "components/search_engines/template_url_data_util.h"
 #include "components/search_engines/template_url_prepopulate_data.h"
 #include "extensions/browser/extension_prefs.h"
 #include "extensions/browser/extension_prefs_factory.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/common/error_utils.h"
 #include "extensions/common/manifest_constants.h"
 
 namespace extensions {
 
 namespace {
 
 base::LazyInstance<BrowserContextKeyedAPIFactory<SettingsOverridesAPI> >
     g_factory = LAZY_INSTANCE_INITIALIZER;
 
 const char kManyStartupPagesWarning[] = "* specifies more than 1 startup URL. "
     "All but the first will be ignored.";
 
 using api::manifest_types::ChromeSettingsOverrides;
 
 std::string SubstituteInstallParam(std::string str,
                                    const std::string& install_parameter) {
   base::ReplaceSubstringsAfterOffset(&str, 0, "__PARAM__", install_parameter);
   return str;
 }
 
-// Find the prepopulated search engine with the given id.
-std::unique_ptr<TemplateURLData> GetPrepopulatedSearchProvider(
-    PrefService* prefs,
-    int prepopulated_id) {
-  size_t default_index;
-  std::vector<std::unique_ptr<TemplateURLData>> engines =
-      TemplateURLPrepopulateData::GetPrepopulatedEngines(prefs, &default_index);
-  for (auto& engine : engines) {
-    if (engine->prepopulate_id == prepopulated_id)
-      return std::move(engine);
-  }
-  return nullptr;
-}
-
 std::unique_ptr<TemplateURLData> ConvertSearchProvider(
     PrefService* prefs,
     const ChromeSettingsOverrides::Search_provider& search_provider,
     const std::string& install_parameter) {
   std::unique_ptr<TemplateURLData> data;
   if (search_provider.prepopulated_id) {
-    data =
-        GetPrepopulatedSearchProvider(prefs, *search_provider.prepopulated_id);
+    data = TemplateURLPrepopulateData::GetPrepopulatedEngine(
+        prefs, *search_provider.prepopulated_id);
     if (!data) {
       VLOG(1) << "Settings Overrides API can't recognize prepopulated_id="
           << *search_provider.prepopulated_id;
     }
   }
 
   if (!data)
     data = base::MakeUnique<TemplateURLData>();
 
   if (search_provider.name)
@@ skipping 58 matching lines @@
 SettingsOverridesAPI::~SettingsOverridesAPI() {
 }
 
 BrowserContextKeyedAPIFactory<SettingsOverridesAPI>*
 SettingsOverridesAPI::GetFactoryInstance() {
   return g_factory.Pointer();
 }
 
 void SettingsOverridesAPI::SetPref(const std::string& extension_id,
                                    const std::string& pref_key,
-                                   base::Value* value) {
+                                   std::unique_ptr<base::Value> value) const {
   PreferenceAPI* prefs = PreferenceAPI::Get(profile_);
   if (!prefs)
     return;  // Expected in unit tests.
-  prefs->SetExtensionControlledPref(extension_id,
-                                    pref_key,
-                                    kExtensionPrefsScopeRegular,
-                                    value);
+  prefs->SetExtensionControlledPref(
+      extension_id, pref_key, kExtensionPrefsScopeRegular, value.release());
 }
 
 void SettingsOverridesAPI::UnsetPref(const std::string& extension_id,
-                                     const std::string& pref_key) {
+                                     const std::string& pref_key) const {
   PreferenceAPI* prefs = PreferenceAPI::Get(profile_);
   if (!prefs)
     return;  // Expected in unit tests.
   prefs->RemoveExtensionControlledPref(
       extension_id,
       pref_key,
       kExtensionPrefsScopeRegular);
 }
 
 void SettingsOverridesAPI::OnExtensionLoaded(
     content::BrowserContext* browser_context,
     const Extension* extension) {
   const SettingsOverrides* settings = SettingsOverrides::Get(extension);
   if (settings) {
     std::string install_parameter =
         ExtensionPrefs::Get(profile_)->GetInstallParam(extension->id());
     if (settings->homepage) {
-      SetPref(extension->id(),
-              prefs::kHomePage,
-              new base::StringValue(SubstituteInstallParam(
+      SetPref(extension->id(), prefs::kHomePage,
+              base::MakeUnique<base::StringValue>(SubstituteInstallParam(
                   settings->homepage->spec(), install_parameter)));
-      SetPref(extension->id(),
-              prefs::kHomePageIsNewTabPage,
-              new base::FundamentalValue(false));
+      SetPref(extension->id(), prefs::kHomePageIsNewTabPage,
+              base::MakeUnique<base::FundamentalValue>(false));
     }
     if (!settings->startup_pages.empty()) {
-      SetPref(extension->id(),
-              prefs::kRestoreOnStartup,
-              new base::FundamentalValue(SessionStartupPref::kPrefValueURLs));
+      // kPrefValueURLs variable defined below is workaround for undefined
+      // symbol SessionStartupPref::kPrefValueURLs link error on mac.

[vasilii, 2016/11/30 14:00:02]

I don't understand it. Now everything compiles fine. What is the error and exact
code?

[Alexander Yashkin, 2016/12/05 18:16:48]

It was a problem with ODR rule applying for SessionStartupPref::kPrefValueURLs
with usage in 
base::MakeUnique<base::FundamentalValue>(SessionStartupPref::kPrefValueURLs)

SessionStartupPref::kPrefValueURLs variable need to be defined and its currently
is only declared in 
chrome/browser/prefs/session_startup_pref.h.
I added definition to session_startup_pref.cc

+      const int kPrefValueURLs = SessionStartupPref::kPrefValueURLs;
+      SetPref(extension->id(), prefs::kRestoreOnStartup,
+              base::MakeUnique<base::FundamentalValue>(kPrefValueURLs));
       if (settings->startup_pages.size() > 1) {
         VLOG(1) << extensions::ErrorUtils::FormatErrorMessage(
                        kManyStartupPagesWarning,
                        manifest_keys::kSettingsOverride);
       }
       std::unique_ptr<base::ListValue> url_list(new base::ListValue);
       url_list->AppendString(SubstituteInstallParam(
           settings->startup_pages[0].spec(), install_parameter));
-      SetPref(
-          extension->id(), prefs::kURLsToRestoreOnStartup, url_list.release());
+      SetPref(extension->id(), prefs::kURLsToRestoreOnStartup,
+              std::move(url_list));
     }
     if (settings->search_engine) {
       // Bring the preference to the correct state. Before this code set it
       // to "true" for all search engines. Thus, we should overwrite it for
       // all search engines.
       if (settings->search_engine->is_default) {
-        SetPref(extension->id(),
-                prefs::kDefaultSearchProviderEnabled,
-                new base::FundamentalValue(true));
+        SetPref(extension->id(), prefs::kDefaultSearchProviderEnabled,
+                base::MakeUnique<base::FundamentalValue>(true));
       } else {
         UnsetPref(extension->id(), prefs::kDefaultSearchProviderEnabled);
       }
       DCHECK(url_service_);
       if (url_service_->loaded()) {
         RegisterSearchProvider(extension);
       } else {
         if (!template_url_sub_) {
           template_url_sub_ = url_service_->RegisterOnLoadedCallback(
               base::Bind(&SettingsOverridesAPI::OnTemplateURLsLoaded,
@@ skipping 13 matching lines @@
   if (settings) {
     if (settings->homepage) {
       UnsetPref(extension->id(), prefs::kHomePage);
       UnsetPref(extension->id(), prefs::kHomePageIsNewTabPage);
     }
     if (!settings->startup_pages.empty()) {
       UnsetPref(extension->id(), prefs::kRestoreOnStartup);
       UnsetPref(extension->id(), prefs::kURLsToRestoreOnStartup);
     }
     if (settings->search_engine) {
+      if (settings->search_engine->is_default) {
+        // Current extension can be overriding DSE.
+        UnsetPref(extension->id(),
+                  DefaultSearchManager::kDefaultSearchProviderDataPrefName);
+      }
       DCHECK(url_service_);
       if (url_service_->loaded()) {
         url_service_->RemoveExtensionControlledTURL(
             extension->id(), TemplateURL::NORMAL_CONTROLLED_BY_EXTENSION);
       } else {
         pending_extensions_.erase(extension);
       }
     }
   }
 }
@@ skipping 25 matching lines @@
 
   ExtensionPrefs* prefs = ExtensionPrefs::Get(profile_);
   info->install_time = prefs->GetInstallTime(extension->id());
   std::string install_parameter = prefs->GetInstallParam(extension->id());
   std::unique_ptr<TemplateURLData> data = ConvertSearchProvider(
       profile_->GetPrefs(), *settings->search_engine, install_parameter);
   auto turl = base::MakeUnique<TemplateURL>(
       *data, TemplateURL::NORMAL_CONTROLLED_BY_EXTENSION);
 
   url_service_->AddExtensionControlledTURL(std::move(turl), std::move(info));
+
+  if (settings->search_engine->is_default) {
+    // Override current DSE pref to have extension overriden value.
+    SetPref(extension->id(),
+            DefaultSearchManager::kDefaultSearchProviderDataPrefName,
+            TemplateURLDataToDictionary(*data));
+  }
 }
 
 template <>
 void BrowserContextKeyedAPIFactory<
     SettingsOverridesAPI>::DeclareFactoryDependencies() {
   DependsOn(ExtensionPrefsFactory::GetInstance());
   DependsOn(PreferenceAPI::GetFactoryInstance());
   DependsOn(TemplateURLServiceFactory::GetInstance());
 }
 
 }  // namespace extensions