Add recommended extension installation support

chrome/browser/extensions/standard_management_policy_provider.cc

Index: chrome/browser/extensions/standard_management_policy_provider.cc
diff --git a/chrome/browser/extensions/standard_management_policy_provider.cc b/chrome/browser/extensions/standard_management_policy_provider.cc
index 0212257468d1e8f6870e3d71511f0ddeb430d3c5..5a91e03bbaafddf4f2c2e00d938c2c790369d469 100644
--- a/chrome/browser/extensions/standard_management_policy_provider.cc
+++ b/chrome/browser/extensions/standard_management_policy_provider.cc
@@ -132,4 +132,26 @@ bool StandardManagementPolicyProvider::MustRemainEnabled(
           ExternalComponentLoader::IsModifiable(extension));
 }
 
+bool StandardManagementPolicyProvider::MustRemainInstalled(
+    const Extension* extension,
+    base::string16* error) const {
+  if (!UserMayModifySettings(extension, error))
+    return true;
+  ExtensionManagement::InstallationMode mode =
+      settings_->GetInstallationMode(extension->id());
+  // Disallowing removing of recommended extension, to avoid re-install it

[Finnur, 2014/10/06 14:01:42]

nit: s/Disallowing/Disallow/

[binjin, 2014/10/06 18:48:47]

Done.

+  // again while policy is reload. But disabling of recommended extension is
+  // allowed.
+  if (mode == ExtensionManagement::INSTALLATION_FORCED ||
+      mode == ExtensionManagement::INSTALLATION_RECOMMENDED) {
+    if (error) {
+      *error = l10n_util::GetStringFUTF16(
+          IDS_EXTENSION_CANT_UNINSTALL_POLICY_REQUIRED,
+          base::UTF8ToUTF16(extension->name()));
+    }
+    return true;
+  }
+  return false;
+}
+
 }  // namespace extensions