Fix memory leak in SectionResourceCursorAdapter.

MyTracks/src/com/google/android/apps/mytracks/SectionResourceCursorAdapter.java

@@ -21,7 +21,6 @@ import com.google.android.maps.mytracks.R;
 
 import android.content.Context;
 import android.database.Cursor;
-import android.database.DataSetObserver;
 import android.support.v4.widget.ResourceCursorAdapter;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -46,25 +45,8 @@ public abstract class SectionResourceCursorAdapter extends ResourceCursorAdapter
   public SectionResourceCursorAdapter(Context context, int layout, Cursor cursor, int flags) {
     super(context, layout, cursor, flags);
     this.layoutInflater = LayoutInflater.from(context);
-
-    if (cursor != null) {
-      sharedWithMeIndex = getSharedWithMeIndex();
-      cursor.registerDataSetObserver(dataSetObserver);
-    }
   }
 
-  private DataSetObserver dataSetObserver = new DataSetObserver() {
-      @Override
-    public void onChanged() {
-      sharedWithMeIndex = getSharedWithMeIndex();
-    };
-
-      @Override
-    public void onInvalidated() {
-      sharedWithMeIndex = -1;
-    };
-  };
-
   @Override
   public View getView(int position, View convertView, ViewGroup parent) {
     if (getItemViewType(position) == ItemType.TRACK.ordinal()) {
@@ -122,15 +104,8 @@ public abstract class SectionResourceCursorAdapter extends ResourceCursorAdapter
 
   @Override
   public Cursor swapCursor(Cursor newCursor) {
-    if (getCursor() != null) {
-      getCursor().unregisterDataSetObserver(dataSetObserver);
-    }
-
     Cursor oldCursor = super.swapCursor(newCursor);
-    if (newCursor != null) {
+    sharedWithMeIndex = getSharedWithMeIndex();
-      sharedWithMeIndex = getSharedWithMeIndex();
-      newCursor.registerDataSetObserver(dataSetObserver);
-    }
     return oldCursor;
   }