Drop all snapshots for Skia change

 Bug: 5388379

Change-Id: Ie41ea6d55f987033c052c87a5a6171a678e09d4f
diff --git a/src/com/android/browser/provider/SnapshotProvider.java b/src/com/android/browser/provider/SnapshotProvider.java
index c0aad23..437a867 100644
--- a/src/com/android/browser/provider/SnapshotProvider.java
+++ b/src/com/android/browser/provider/SnapshotProvider.java
@@ -72,7 +72,7 @@
     final static class SnapshotDatabaseHelper extends SQLiteOpenHelper {
 
         static final String DATABASE_NAME = "snapshots.db";
-        static final int DATABASE_VERSION = 1;
+        static final int DATABASE_VERSION = 2;
 
         public SnapshotDatabaseHelper(Context context) {
             super(context, getFullDatabaseName(context), null, DATABASE_VERSION);
@@ -99,7 +99,10 @@
 
         @Override
         public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
-            // Not needed yet
+            if (oldVersion < 2) {
+                db.execSQL("DROP TABLE " + TABLE_SNAPSHOTS);
+                onCreate(db);
+            }
         }
 
     }