Sync: local data verification for Android tests

chrome/browser/sync/profile_sync_service_android.h

Index: chrome/browser/sync/profile_sync_service_android.h
diff --git a/chrome/browser/sync/profile_sync_service_android.h b/chrome/browser/sync/profile_sync_service_android.h
index 3b791544a88b407bd87038932a82653bf7e46495..db7e6793bf9bad2daa5160981fec6186449bf6b8 100644
--- a/chrome/browser/sync/profile_sync_service_android.h
+++ b/chrome/browser/sync/profile_sync_service_android.h
@@ -53,6 +53,10 @@ class ProfileSyncServiceAndroid : public sync_driver::SyncServiceObserver {
   base::android::ScopedJavaLocalRef<jstring> QuerySyncStatusSummary(
       JNIEnv* env, jobject obj);
 
+  // Retrieves all Sync data as JSON. This method is asynchronous; all data is
+  // passed to |callback| upon completion.
+  void GetAllNodes(JNIEnv* env, jobject obj, jobject callback);
+
   // Called from Java early during startup to ensure we use the correct
   // unique machine tag in session sync. Returns true if the machine tag was
   // succesfully set.