Use Sync FakeServer in Android tests via custom APK

sync/test/android/javatests/src/org/chromium/sync/test/util/FakeServerHelper.java

Index: sync/test/android/javatests/src/org/chromium/sync/test/util/FakeServerHelper.java
diff --git a/sync/test/android/javatests/src/org/chromium/sync/test/util/FakeServerHelper.java b/sync/test/android/javatests/src/org/chromium/sync/test/util/FakeServerHelper.java
new file mode 100644
index 0000000000000000000000000000000000000000..295725674de6d5b99f70b0b7f19ef72b4cbd7645
--- /dev/null
+++ b/sync/test/android/javatests/src/org/chromium/sync/test/util/FakeServerHelper.java
@@ -0,0 +1,67 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.sync.test.util;
+
+/**
+ * Assists in Java interaction the native Sync FakeServer.
+ */
+public class FakeServerHelper {
+    // Lazily-instantiated singleton FakeServerHelper.
+    private static FakeServerHelper sFakeServerHelper;
+
+    // The pointer to the native object called here.
+    private final long mNativeFakeServerHelperAndroid;
+
+    // Accesses the singleton FakeServerHelper. There is at most one instance created per
+    // application lifetime, so no deletion mechanism is provided for the native object.
+    public static FakeServerHelper get() {
+        if (sFakeServerHelper == null) {
+            sFakeServerHelper = new FakeServerHelper();
+        }
+        return sFakeServerHelper;
+    }
+
+    private FakeServerHelper() {
+        mNativeFakeServerHelperAndroid = nativeInit();
+    }
+
+    /**
+     * Creates a native FakeServer object and returns its pointer. This pointer is owned by the
+     * Java caller.
+     *
+     * @return the FakeServer pointer
+     */
+    public long createFakeServer() {
+        return nativeCreateFakeServer(mNativeFakeServerHelperAndroid);
+    }
+
+    /**
+     * Creates a native NetworkResources object. This pointer is owned by the Java caller, but
+     * ownership is transferred as part of ProfileSyncService.overrideNetworkResourcesForTest.
+     *
+     * @param nativeFakeServer pointer to a native FakeServer object.
+     * @return the NetworkResources pointer
+     */
+    public long createNetworkResources(long nativeFakeServer) {
+        return nativeCreateNetworkResources(mNativeFakeServerHelperAndroid, nativeFakeServer);
+    }
+
+    /**
+     * Deletes a native FakeServer.
+     *
+     * @param nativeFakeServer the pointer to be deleted
+     */
+    public void deleteFakeServer(long nativeFakeServer) {
+        nativeDeleteFakeServer(mNativeFakeServerHelperAndroid, nativeFakeServer);
+    }
+
+    // Native methods.
+    private native long nativeInit();
+    private native long nativeCreateFakeServer(long nativeFakeServerHelperAndroid);
+    private native long nativeCreateNetworkResources(
+            long nativeFakeServerHelperAndroid, long nativeFakeServer);
+    private native void nativeDeleteFakeServer(
+            long nativeFakeServerHelperAndroid, long nativeFakeServer);
+}