[Sync] Introduce GmsCoreSyncListener.

sync/test/fake_server/android/fake_server_helper_android.cc

 // 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.
 
 #include "sync/test/fake_server/android/fake_server_helper_android.h"
 
 #include <jni.h>
 
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
@@ skipping 276 matching lines @@
     jobject obj,
     jlong fake_server,
     jstring id) {
   fake_server::FakeServer* fake_server_ptr =
       reinterpret_cast<fake_server::FakeServer*>(fake_server);
   std::string native_id = base::android::ConvertJavaStringToUTF8(env, id);
   fake_server_ptr->InjectEntity(
       fake_server::TombstoneEntity::Create(native_id));
 }
 
+void FakeServerHelperAndroid::ClearServerData(JNIEnv* env,
+                                              jobject obj,
+                                              jlong fake_server) {
+  fake_server::FakeServer* fake_server_ptr =
+      reinterpret_cast<fake_server::FakeServer*>(fake_server);
+  fake_server_ptr->ClearServerData();
+}
+
 // static
 bool FakeServerHelperAndroid::Register(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }