Update settings search page for secondary user

Check whether the user is primary when setup the search page in CrOS
settings. Remove the voice interaction entry and change the title if the
user is not primary.

BUG=b/66919596

Change-Id: I1b38de178830862ebca9c56160ddab595640c844
Reviewed-on: https://chromium-review.googlesource.com/689965Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Yue Li <updowndota@chromium.org>
Cr-Commit-Position: refs/heads/master@{#505232}

chrome/browser/ui/webui/settings/md_settings_localized_strings_provider.cc

@@ -1602,12 +1602,18 @@ void AddSearchInSettingsStrings(content::WebUIDataSource* html_source) {
 }
 
 void AddSearchStrings(content::WebUIDataSource* html_source, Profile* profile) {
+#if defined(OS_CHROMEOS)
+  const bool is_user_primary =
+      chromeos::ProfileHelper::Get()->GetUserByProfile(profile) ==
+      user_manager::UserManager::Get()->GetPrimaryUser();
+#endif
+
   LocalizedString localized_strings[] = {
 #if defined(OS_CHROMEOS)
-    {"searchPageTitle",
-     !profile->IsSupervised() && chromeos::switches::IsVoiceInteractionEnabled()
-         ? IDS_SETTINGS_SEARCH_AND_ASSISTANT
-         : IDS_SETTINGS_SEARCH},
+    {"searchPageTitle", !profile->IsSupervised() && is_user_primary &&
+                                chromeos::switches::IsVoiceInteractionEnabled()
+                            ? IDS_SETTINGS_SEARCH_AND_ASSISTANT
+                            : IDS_SETTINGS_SEARCH},
 #else
     {"searchPageTitle", IDS_SETTINGS_SEARCH},
 #endif
@@ -1644,8 +1650,9 @@ void AddSearchStrings(content::WebUIDataSource* html_source, Profile* profile) {
       base::ASCIIToUTF16(chrome::kOmniboxLearnMoreURL));
   html_source->AddString("searchExplanation", search_explanation_text);
 #if defined(OS_CHROMEOS)
-  html_source->AddBoolean("enableVoiceInteraction",
-                          chromeos::switches::IsVoiceInteractionEnabled());
+  html_source->AddBoolean(
+      "enableVoiceInteraction",
+      chromeos::switches::IsVoiceInteractionEnabled() && is_user_primary);
 #endif
 }