Add in-profile external_extensions.json file for Chrome OS OEM customization.

chrome/browser/extensions/external_extension_provider_impl.cc

 // Copyright (c) 2011 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/external_extension_provider_impl.h"
 
 #include "app/app_paths.h"
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/linked_ptr.h"
@@ skipping 125 matching lines @@
 
       scoped_ptr<Version> version;
       version.reset(Version::GetVersionFromString(external_version));
       if (!version.get()) {
         LOG(WARNING) << "Malformed extension dictionary for extension: "
                      << extension_id.c_str() << ".  Invalid version string \""
                      << external_version << "\".";
         continue;
       }
       service_->OnExternalExtensionFileFound(extension_id, version.get(), path,
-                                            crx_location_);
+                                             crx_location_);
     } else { // if (has_external_update_url)
       CHECK(has_external_update_url);  // Checking of keys above ensures this.
       if (download_location_ == Extension::INVALID) {
         LOG(WARNING) << "This provider does not support installing external "
                      << "extensions from update URLs.";
         continue;
       }
       GURL update_url(external_update_url);
       if (!update_url.is_valid()) {
         LOG(WARNING) << "Malformed extension dictionary for extension: "
@@ skipping 63 matching lines @@
 
 // static
 void ExternalExtensionProviderImpl::CreateExternalProviders(
     VisitorInterface* service,
     Profile* profile,
     ProviderCollection* provider_list) {
   provider_list->push_back(
       linked_ptr<ExternalExtensionProviderInterface>(
           new ExternalExtensionProviderImpl(
               service,
-              new ExternalPrefExtensionLoader(app::DIR_EXTERNAL_EXTENSIONS),
+              new ExternalPrefExtensionLoader(
+                  app::DIR_EXTERNAL_EXTENSIONS),
               Extension::EXTERNAL_PREF,
               Extension::EXTERNAL_PREF_DOWNLOAD)));
+
+#if defined(OS_CHROMEOS)
+  // Chrome OS specific source for OEM customization.
+  provider_list->push_back(
+      linked_ptr<ExternalExtensionProviderInterface>(
+          new ExternalExtensionProviderImpl(
+              service,
+              new ExternalPrefExtensionLoader(
+                  chrome::DIR_USER_EXTERNAL_EXTENSIONS),
+              Extension::EXTERNAL_PREF,
+              Extension::EXTERNAL_PREF_DOWNLOAD)));
+#endif
 #if defined(OS_WIN)
   provider_list->push_back(
       linked_ptr<ExternalExtensionProviderInterface>(
           new ExternalExtensionProviderImpl(
               service,
               new ExternalRegistryExtensionLoader,
               Extension::EXTERNAL_REGISTRY,
               Extension::INVALID)));
 #endif
   provider_list->push_back(
       linked_ptr<ExternalExtensionProviderInterface>(
           new ExternalExtensionProviderImpl(
               service,
               new ExternalPolicyExtensionLoader(profile),
               Extension::INVALID,
               Extension::EXTERNAL_POLICY_DOWNLOAD)));
 }