diff -r 000000000000 -r 6474c204b198 mobile/android/base/db/AbstractPerProfileDatabaseProvider.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mobile/android/base/db/AbstractPerProfileDatabaseProvider.java	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,79 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+package org.mozilla.gecko.db;
+
+import org.mozilla.gecko.mozglue.RobocopTarget;
+
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+import android.net.Uri;
+
+/**
+ * The base class for ContentProviders that wish to use a different DB
+ * for each profile.
+ *
+ * This class has logic shared between ordinary per-profile CPs and
+ * those that wish to share DB connections between CPs.
+ */
+public abstract class AbstractPerProfileDatabaseProvider extends AbstractTransactionalProvider {
+
+    /**
+     * Extend this to provide access to your own map of shared databases. This
+     * is a method so that your subclass doesn't collide with others!
+     */
+    protected abstract PerProfileDatabases<? extends SQLiteOpenHelper> getDatabases();
+
+    /*
+     * Fetches a readable database based on the profile indicated in the
+     * passed URI. If the URI does not contain a profile param, the default profile
+     * is used.
+     *
+     * @param uri content URI optionally indicating the profile of the user
+     * @return    instance of a readable SQLiteDatabase
+     */
+    @Override
+    protected SQLiteDatabase getReadableDatabase(Uri uri) {
+        String profile = null;
+        if (uri != null) {
+            profile = uri.getQueryParameter(BrowserContract.PARAM_PROFILE);
+        }
+
+        return getDatabases().getDatabaseHelperForProfile(profile, isTest(uri)).getReadableDatabase();
+    }
+
+    /*
+     * Fetches a writable database based on the profile indicated in the
+     * passed URI. If the URI does not contain a profile param, the default profile
+     * is used
+     *
+     * @param uri content URI optionally indicating the profile of the user
+     * @return    instance of a writable SQLiteDatabase
+     */
+    @Override
+    protected SQLiteDatabase getWritableDatabase(Uri uri) {
+        String profile = null;
+        if (uri != null) {
+            profile = uri.getQueryParameter(BrowserContract.PARAM_PROFILE);
+        }
+
+        return getDatabases().getDatabaseHelperForProfile(profile, isTest(uri)).getWritableDatabase();
+    }
+
+    protected SQLiteDatabase getWritableDatabaseForProfile(String profile, boolean isTest) {
+        return getDatabases().getDatabaseHelperForProfile(profile, isTest).getWritableDatabase();
+    }
+
+    /**
+     * This method should ONLY be used for testing purposes.
+     *
+     * @param uri content URI optionally indicating the profile of the user
+     * @return    instance of a writable SQLiteDatabase
+     */
+    @Override
+    @RobocopTarget
+    public SQLiteDatabase getWritableDatabaseForTesting(Uri uri) {
+        return getWritableDatabase(uri);
+    }
+}