Add recommended extension installation support

chrome/browser/ui/webui/extensions/extension_settings_handler.cc

Index: chrome/browser/ui/webui/extensions/extension_settings_handler.cc
diff --git a/chrome/browser/ui/webui/extensions/extension_settings_handler.cc b/chrome/browser/ui/webui/extensions/extension_settings_handler.cc
index 20e6b3fc28c78ee2ae84cc5f6392652a0eedeb38..1e61fee0f0f90b729bbccddf3dcb1bf6a2c24441 100644
--- a/chrome/browser/ui/webui/extensions/extension_settings_handler.cc
+++ b/chrome/browser/ui/webui/extensions/extension_settings_handler.cc
@@ -238,8 +238,13 @@ base::DictionaryValue* ExtensionSettingsHandler::CreateExtensionDetailValue(
       !management_policy_->UserMayModifySettings(extension, NULL);
   extension_data->SetBoolean("managedInstall", managed_install);
 
+  bool recommended_install =
+      !managed_install &&
+      management_policy_->MustRemainInstalled(extension, NULL);
+  extension_data->SetBoolean("recommendedInstall", recommended_install);
+
   // We should not get into a state where both are true.
-  DCHECK(!managed_install || !suspicious_install);
+  DCHECK(!(managed_install || recommended_install) || !suspicious_install);
 
   GURL icon =
       ExtensionIconSource::GetIconURL(extension,
@@ -310,7 +315,9 @@ base::DictionaryValue* ExtensionSettingsHandler::CreateExtensionDetailValue(
           extension_service_->GetBrowserContext()));
 
   base::string16 location_text;
-  if (Manifest::IsPolicyLocation(extension->location())) {
+  if (Manifest::IsPolicyLocation(extension->location()) ||
+      (extension->location() == Manifest::EXTERNAL_PREF_DOWNLOAD &&
+       recommended_install)) {
     location_text = l10n_util::GetStringUTF16(
         IDS_OPTIONS_INSTALL_LOCATION_ENTERPRISE);
   } else if (extension->location() == Manifest::INTERNAL &&
@@ -526,6 +533,8 @@ void ExtensionSettingsHandler::GetLocalizedValues(
       l10n_util::GetStringUTF16(IDS_EXTENSIONS_VISIT_WEBSTORE));
   source->AddString("extensionSettingsPolicyControlled",
       l10n_util::GetStringUTF16(IDS_EXTENSIONS_POLICY_CONTROLLED));
+  source->AddString("extensionSettingsPolicyRecommeneded",
+      l10n_util::GetStringUTF16(IDS_EXTENSIONS_POLICY_RECOMMENDED));
   source->AddString("extensionSettingsDependentExtensions",
       l10n_util::GetStringUTF16(IDS_EXTENSIONS_DEPENDENT_EXTENSIONS));
   source->AddString("extensionSettingsSupervisedUser",