Backing out unpushed ef8239961ed3 to merge with newest TrackDataHub.

MyTracks/src/com/google/android/apps/mytracks/content/TrackDataHub.java

@@ -240,7 +240,6 @@ public class TrackDataHub {
    */
   public void start() {
     Log.i(TAG, "TrackDataHub.start");
-    synchronized (this) {
     if (startedInstance != null) {
       Log.w(TAG, "Already started, ignoring");
       return;
@@ -257,7 +256,6 @@ public class TrackDataHub {
     // we already had external listeners.
     dataSourceManager.updateAllListeners(getNeededListenerTypes());
     loadSharedPreferences();
-    }
 
     // If there were listeners already registered, make sure they become up-to-date.
     loadDataForAllListeners();
@@ -288,7 +286,6 @@ public class TrackDataHub {
    */
   public void stop() {
     Log.i(TAG, "TrackDataHub.stop");
-    synchronized (this) {
     if (!isStarted()) {
       Log.w(TAG, "Not started, ignoring");
       return;
@@ -305,7 +302,6 @@ public class TrackDataHub {
     listenerHandlerThread = null;
     listenerHandler = null;
   }
-  }
 
   private boolean isStarted() {
     return startedInstance != null;