Remove thread when onDestroyView is called on BrowserBookmarksPage

Change-Id: Ied0293b7f1dbfe16c3517dbb9e2b19c8030d31a1
diff --git a/src/com/android/browser/BrowserBookmarksPage.java b/src/com/android/browser/BrowserBookmarksPage.java
index e799662..82109e9 100644
--- a/src/com/android/browser/BrowserBookmarksPage.java
+++ b/src/com/android/browser/BrowserBookmarksPage.java
@@ -450,6 +450,7 @@
         LoaderManager lm = getLoaderManager();
         lm.destroyLoader(LOADER_ACCOUNTS);
         for (int id : mBookmarkAdapters.keySet()) {
+            mBookmarkAdapters.get(id).quitThread();
             lm.destroyLoader(id);
         }
         mBookmarkAdapters.clear();