Install default apps if sync is disabled.

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 <string>
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/scoped_observer.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/external_loader.h"
 #include "chrome/browser/prefs/pref_service_syncable_observer.h"
+#include "chrome/browser/sync/profile_sync_service.h"
+#include "chrome/browser/sync/profile_sync_service_observer.h"
 
 class PrefServiceSyncable;
 class Profile;
 
 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 PrefServiceSyncableObserver {
+                           public PrefServiceSyncableObserver,
+                           public ProfileSyncServiceObserver {
  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,
 
     // Delay external preference load. It delays default apps installation
@@ skipping 22 matching lines @@
   const int base_path_id_;
 
   const Options options_;
 
  private:
   friend class base::RefCountedThreadSafe<ExternalLoader>;
 
   // PrefServiceSyncableObserver:
   void OnIsSyncingChanged() override;
 
+  // ProfileSyncServiceObserver
+  void OnStateChanged() override;
+
   // If priority sync ready posts LoadOnFileThread and return true.
   bool PostLoadIfPrioritySyncReady();
 
+  // Post LoadOnFileThread and stop observing for sync service states.
+  void PostLoadAndRemoveObservers();
+
   // Actually searches for and loads candidate standalone extension preference
   // files in the path corresponding to |base_path_id|.
   // Must be called on the file thread.
   void LoadOnFileThread();
 
   // Extracts the information contained in an external_extension.json file
   // regarding which extensions to install. |prefs| will be modified to
   // receive the extracted extension information.
   // Must be called from the File thread.
   void ReadExternalExtensionPrefFile(base::DictionaryValue* prefs);
@@ skipping 39 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_