Adds a new checkbox for backup and restore in opt-in flow.

chrome/browser/chromeos/arc/arc_support_host.cc

Index: chrome/browser/chromeos/arc/arc_support_host.cc
diff --git a/chrome/browser/chromeos/arc/arc_support_host.cc b/chrome/browser/chromeos/arc/arc_support_host.cc
index 3713eb058dab9ea26329320fbb9e032a40d6dcb9..bdc78c67af0dba74adf47f1b12f14cf0d9d9d446 100644
--- a/chrome/browser/chromeos/arc/arc_support_host.cc
+++ b/chrome/browser/chromeos/arc/arc_support_host.cc
@@ -19,6 +19,7 @@
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/ash/multi_user/multi_user_util.h"
 #include "chrome/browser/ui/browser_commands.h"
+#include "chrome/common/pref_names.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/metrics/metrics_pref_names.h"
 #include "components/prefs/pref_service.h"
@@ -28,13 +29,15 @@
 
 namespace {
 const char kAction[] = "action";
-const char kCode[] = "code";
+const char kBackupRestoreEnabled[] = "backupRestoreEnabled";
 const char kCanEnable[] = "canEnable";
-const char kStatus[] = "status";
+const char kCode[] = "code";
 const char kData[] = "data";
 const char kDeviceId[] = "deviceId";
+const char kEnabled[] = "enabled";
 const char kOn[] = "on";
 const char kPage[] = "page";
+const char kStatus[] = "status";
 const char kText[] = "text";
 const char kActionInitialize[] = "initialize";
 const char kActionSetMetricsMode[] = "setMetricsMode";
@@ -43,6 +46,7 @@ const char kActionCancelAuthCode[] = "cancelAuthCode";
 const char kActionSetAuthCode[] = "setAuthCode";
 const char kActionEnableMetrics[] = "enableMetrics";
 const char kActionSendFeedback[] = "sendFeedback";
+const char kActionSetBackupRestore[] = "setBackupRestore";
 const char kActionCloseUI[] = "closeUI";
 const char kActionShowPage[] = "showPage";
 }  // namespace
@@ -98,7 +102,6 @@ void ArcSupportHost::Start(Client* client) {
 
 void ArcSupportHost::Initialize() {
   DCHECK(client_);
-
   std::unique_ptr<base::DictionaryValue> localized_strings(

[Yusuke Sato, 2016/06/30 18:06:47]

nit: this is no longer "strings". what about renaming this to load_time_data or
something like that?

       new base::DictionaryValue());
   base::string16 device_name = ash::GetChromeOSDeviceName();
@@ -133,14 +136,23 @@ void ArcSupportHost::Initialize() {
   localized_strings->SetString(
       "termsOfService",
       l10n_util::GetStringUTF16(IDS_ARC_OPT_IN_DIALOG_TERMS_OF_SERVICE));
+  localized_strings->SetString(
+      "textBackupRestore",
+      l10n_util::GetStringUTF16(IDS_ARC_OPT_IN_DIALOG_BACKUP_RESTORE));
 
   const std::string& app_locale = g_browser_process->GetApplicationLocale();
   const std::string& country_code = base::CountryCodeForCurrentTimezone();
   localized_strings->SetString("countryCode", country_code);
 
-  webui::SetLoadTimeDataDefaults(app_locale, localized_strings.get());
 
   arc::ArcAuthService* arc_auth_service = arc::ArcAuthService::Get();
+
+  localized_strings->SetBoolean(
+      kBackupRestoreEnabled,
+      arc_auth_service->profile()->GetPrefs()->GetBoolean(
+          prefs::kArcBackupRestoreEnabled));
+
+  webui::SetLoadTimeDataDefaults(app_locale, localized_strings.get());
   DCHECK(arc_auth_service);
   const std::string device_id = user_manager::known_user::GetDeviceId(
       multi_user_util::GetAccountIdFromProfile(arc_auth_service->profile()));
@@ -215,8 +227,13 @@ void ArcSupportHost::OnOptInUIShowPage(arc::ArcAuthService::UIPage page,
   client_->PostMessageFromNativeHost(response_string);
 }
 
-void ArcSupportHost::EnableMetrics() {
-  InitiateMetricsReportingChange(true, OnMetricsReportingCallbackType());
+void ArcSupportHost::EnableMetrics(bool is_enabled) {
+  InitiateMetricsReportingChange(is_enabled, OnMetricsReportingCallbackType());
+}
+
+void ArcSupportHost::EnableBackupRestore(bool is_enabled) {
+  PrefService* pref_service = arc::ArcAuthService::Get()->profile()->GetPrefs();
+  pref_service->SetBoolean(prefs::kArcBackupRestoreEnabled, is_enabled);
 }
 
 void ArcSupportHost::OnMessage(const std::string& request_string) {
@@ -249,9 +266,21 @@ void ArcSupportHost::OnMessage(const std::string& request_string) {
   } else if (action == kActionCancelAuthCode) {
     arc_auth_service->CancelAuthCode();
   } else if (action == kActionEnableMetrics) {
-    EnableMetrics();
+    bool is_enabled;
+    if (!request->GetBoolean(kEnabled, &is_enabled)) {
+      NOTREACHED();
+      return;
+    }
+    EnableMetrics(is_enabled);
   } else if (action == kActionSendFeedback) {
     chrome::OpenFeedbackDialog(nullptr);
+  } else if (action == kActionSetBackupRestore) {
+    bool is_enabled;
+    if (!request->GetBoolean(kEnabled, &is_enabled)) {
+      NOTREACHED();
+      return;
+    }
+    EnableBackupRestore(is_enabled);
   } else {
     NOTREACHED();
   }