Use Sync FakeServer in Android tests via custom APK

chrome/android/java/src/org/chromium/chrome/browser/sync/ProfileSyncService.java

 // Copyright 2013 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.chrome.browser.sync;
 
 import android.content.Context;
 import android.util.Log;
 
 import com.google.common.annotations.VisibleForTesting;
@@ skipping 483 matching lines @@
     /**
      * Returns the time when the last sync cycle was completed.
      *
      * @return The difference measured in microseconds, between last sync cycle completion time
      * and 1 January 1970 00:00:00 UTC.
      */
     public long getLastSyncedTimeForTest() {
         return nativeGetLastSyncedTimeForTest(mNativeProfileSyncServiceAndroid);
     }
 
+    /**
+     * Overrides the Sync engine's NetworkResources. This is used to set up the Sync FakeServer for
+     * testing.
+     *
+     * @param networkResources the pointer to the NetworkResources created by the native code. It
+     *                         is assumed that the Java caller has ownership of this pointer;
+     *                         ownership is transferred as part of this call.
+     */
+    public void overrideNetworkResourcesForTest(long networkResources) {
+        nativeOverrideNetworkResourcesForTest(mNativeProfileSyncServiceAndroid, networkResources);
+    }
+
     // Native methods
     private native void nativeNudgeSyncer(
             long nativeProfileSyncServiceAndroid, int objectSource, String objectId, long version,
             String payload);
     private native void nativeNudgeSyncerForAllTypes(long nativeProfileSyncServiceAndroid);
     private native long nativeInit();
     private native void nativeEnableSync(long nativeProfileSyncServiceAndroid);
     private native void nativeDisableSync(long nativeProfileSyncServiceAndroid);
     private native void nativeSignInSync(long nativeProfileSyncServiceAndroid);
     private native void nativeSignOutSync(long nativeProfileSyncServiceAndroid);
@@ skipping 31 matching lines @@
             long nativeProfileSyncServiceAndroid, boolean syncEverything, long modelTypeSelection);
     private native void nativeSetSetupInProgress(
             long nativeProfileSyncServiceAndroid, boolean inProgress);
     private native void nativeSetSyncSetupCompleted(long nativeProfileSyncServiceAndroid);
     private native boolean nativeHasSyncSetupCompleted(long nativeProfileSyncServiceAndroid);
     private native boolean nativeIsStartSuppressed(long nativeProfileSyncServiceAndroid);
     private native boolean nativeHasKeepEverythingSynced(long nativeProfileSyncServiceAndroid);
     private native boolean nativeHasUnrecoverableError(long nativeProfileSyncServiceAndroid);
     private native String nativeGetAboutInfoForTest(long nativeProfileSyncServiceAndroid);
     private native long nativeGetLastSyncedTimeForTest(long nativeProfileSyncServiceAndroid);
+    private native void nativeOverrideNetworkResourcesForTest(
+            long nativeProfileSyncServiceAndroid, long networkResources);
 }