This CL implements alternative asynchronous methods for profile and preferences loading.

BUG=chromium-os:11104
TEST=UserProfileGotten (see "/tmp/login-times-sent") time doesn't increase, while UI jankness decreases.

Review URL: http://codereview.chromium.org/6716025

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@81394 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 13 insertions, 0 deletions

diff --git a/chrome/common/json_pref_store.h b/chrome/common/json_pref_store.h
index b2a1f53..d8da37d 100644
--- a/chrome/common/json_pref_store.h
+++ b/chrome/common/json_pref_store.h
@@ -27,6 +27,11 @@ class Value;
 class JsonPrefStore : public PersistentPrefStore,
                       public ImportantFileWriter::DataSerializer {
  public:
+  class Delegate {
+   public:
+    virtual void OnPrefsRead(PrefReadError error, bool no_dir) = 0;
+  };
+
   // |file_message_loop_proxy| is the MessageLoopProxy for a thread on which
   // file I/O can be done.
   JsonPrefStore(const FilePath& pref_filename,
@@ -46,11 +51,17 @@ class JsonPrefStore : public PersistentPrefStore,
   virtual void RemoveValue(const std::string& key);
   virtual bool ReadOnly() const;
   virtual PrefReadError ReadPrefs();
+  // todo(altimofeev): move it to the PersistentPrefStore inteface.
+  void ReadPrefs(Delegate* delegate);
   virtual bool WritePrefs();
   virtual void ScheduleWritePrefs();
   virtual void CommitPendingWrite();
   virtual void ReportValueChanged(const std::string& key);
 
+  // This method is called after JSON file has been read. Method takes
+  // ownership of the |value| pointer.
+  void OnFileRead(Value* value_owned, PrefReadError error, bool no_dir);
+
  private:
   // ImportantFileWriter::DataSerializer overrides:
   virtual bool SerializeData(std::string* output);
@@ -66,6 +77,8 @@ class JsonPrefStore : public PersistentPrefStore,
 
   ObserverList<PrefStore::Observer, true> observers_;
 
+  Delegate* delegate_;
+
   DISALLOW_COPY_AND_ASSIGN(JsonPrefStore);
 };