Delay default apps installation on Chrome OS for first time sign-in

chrome/browser/extensions/external_pref_loader.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTERNAL_PREF_LOADER_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTERNAL_PREF_LOADER_H_
 
 #include "chrome/browser/extensions/external_loader.h"
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/values.h"
 
 namespace extensions {
 
 // A specialization of the ExternalLoader that uses a json file to
 // look up which external extensions are registered.
 // Instances of this class are expected to be created and destroyed on the UI
 // thread and they are expecting public method calls from the UI thread.
 class ExternalPrefLoader : public ExternalLoader {
  public:
   enum Options {
     NONE = 0,
 
     // Ensure that only root can force an external install by checking
     // that all components of the path to external extensions files are
     // owned by root and not writable by any non-root user.
-    ENSURE_PATH_CONTROLLED_BY_ADMIN = 1 << 0
+    ENSURE_PATH_CONTROLLED_BY_ADMIN = 1 << 0,
+
+    // Delay external preference load. It delays default apps installation
+    // to don't overload system on first time user login.

[asargent_no_longer_on_chrome, 2014/10/23 22:34:35]

grammar nit: should be "... to not overload the system ..."

[Dmitry Polukhin, 2014/10/24 11:40:42]

Done.

+    DELAY_LOAD = 1 << 1,
   };
 
   // |base_path_id| is the directory containing the external_extensions.json
   // file or the standalone extension manifest files. Relative file paths to
   // extension files are resolved relative to this path.
   ExternalPrefLoader(int base_path_id, Options options);
 
   const base::FilePath GetBaseCrxFilePath() override;
 
  protected:
@@ skipping 57 matching lines @@
 
   base::FilePath fake_base_path_;
   scoped_ptr<base::DictionaryValue> testing_prefs_;
 
   DISALLOW_COPY_AND_ASSIGN(ExternalTestingLoader);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTERNAL_PREF_LOADER_H_