Enable write ahead logging in browser database.

Bug:3337213
Change-Id: I316beb857cec441b0dffeb93073651632f7c86b7
diff --git a/src/com/android/browser/provider/BrowserProvider2.java b/src/com/android/browser/provider/BrowserProvider2.java
index 919a135..993b6ff 100644
--- a/src/com/android/browser/provider/BrowserProvider2.java
+++ b/src/com/android/browser/provider/BrowserProvider2.java
@@ -402,6 +402,7 @@
 
         @Override
         public void onOpen(SQLiteDatabase db) {
+            db.enableWriteAheadLogging();
             mSyncHelper.onDatabaseOpened(db);
         }