Android JNI gen: Don't emit code for empty RegisterNatives()

chromecast/base/android/dumpstate_writer.cc

 // Copyright 2015 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 "chromecast/base/android/dumpstate_writer.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "jni/DumpstateWriter_jni.h"
 
 namespace chromecast {
 
 // static
-bool DumpstateWriter::RegisterJni(JNIEnv* env) {
-  return RegisterNativesImpl(env);
-}
-
-// static
 void DumpstateWriter::AddDumpValue(const std::string& name,
                                    const std::string& value) {
   JNIEnv* env = base::android::AttachCurrentThread();
   Java_DumpstateWriter_addDumpValue(
       env,
       base::android::ConvertUTF8ToJavaString(env, name).obj(),
       base::android::ConvertUTF8ToJavaString(env, value).obj());
 }
 
 }  // namespace chromecast