Extension syncing: Introduce a NeedsSync pref

extensions/browser/extension_prefs.cc

 // Copyright 2014 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 "extensions/browser/extension_prefs.h"
 
 #include <iterator>
 
 #include "base/command_line.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 174 matching lines @@
 
 // A list of installed ids and a signature.
 const char kInstallSignature[] = "extensions.install_signature";
 
 // A boolean preference that indicates whether the extension should not be
 // synced. Default value is false.
 const char kPrefDoNotSync[] = "do_not_sync";
 
 const char kCorruptedDisableCount[] = "extensions.corrupted_disable_count";
 
+// A boolean preference that indicates whether the extension has local changes
+// that need to be synced. Default value is false.
+const char kPrefNeedsSync[] = "needs_sync";
+
 // Provider of write access to a dictionary storing extension prefs.
 class ScopedExtensionPrefUpdate : public DictionaryPrefUpdate {
  public:
   ScopedExtensionPrefUpdate(PrefService* service,
                             const std::string& extension_id) :
     DictionaryPrefUpdate(service, pref_names::kExtensions),
     extension_id_(extension_id) {}
 
   ~ScopedExtensionPrefUpdate() override {}
 
@@ skipping 1640 matching lines @@
 
 int ExtensionPrefs::GetCorruptedDisableCount() const {
   return prefs_->GetInteger(kCorruptedDisableCount);
 }
 
 void ExtensionPrefs::IncrementCorruptedDisableCount() {
   int count = prefs_->GetInteger(kCorruptedDisableCount);
   prefs_->SetInteger(kCorruptedDisableCount, count + 1);
 }
 
+bool ExtensionPrefs::NeedsSync(const std::string& extension_id) const {
+  return ReadPrefAsBooleanAndReturn(extension_id, kPrefNeedsSync);
+}
+
+void ExtensionPrefs::SetNeedsSync(const std::string& extension_id,
+                                  bool needs_sync) {
+  UpdateExtensionPref(extension_id, kPrefNeedsSync,
+                      needs_sync ? new base::FundamentalValue(true) : nullptr);
+}
+
 ExtensionPrefs::ExtensionPrefs(
     PrefService* prefs,
     const base::FilePath& root_dir,
     ExtensionPrefValueMap* extension_pref_value_map,
     scoped_ptr<AppSorting> app_sorting,
     scoped_ptr<TimeProvider> time_provider,
     bool extensions_disabled,
     const std::vector<ExtensionPrefsObserver*>& early_observers)
     : prefs_(prefs),
       install_directory_(root_dir),
@@ skipping 244 matching lines @@
   extension_pref_value_map_->RegisterExtension(
       extension_id, install_time, is_enabled, is_incognito_enabled);
 
   FOR_EACH_OBSERVER(
       ExtensionPrefsObserver,
       observer_list_,
       OnExtensionRegistered(extension_id, install_time, is_enabled));
 }
 
 }  // namespace extensions