Make PassphraseType a "enum class" instead of "enum".

chrome/browser/sync/profile_sync_service_android.cc

 // 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.
 
 #include "chrome/browser/sync/profile_sync_service_android.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
@@ skipping 272 matching lines @@
     const JavaParamRef<jobject>& obj) {
   std::string key = sync_service_->GetCustomPassphraseKey();
   return base::android::ToJavaByteArray(
       env, reinterpret_cast<const uint8_t*>(key.data()), key.size());
 }
 
 jint ProfileSyncServiceAndroid::GetPassphraseType(
     JNIEnv* env,
     const JavaParamRef<jobject>&) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  return sync_service_->GetPassphraseType();
+  return static_cast<unsigned>(sync_service_->GetPassphraseType());
 }
 
 void ProfileSyncServiceAndroid::SetEncryptionPassphrase(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj,
     const JavaParamRef<jstring>& passphrase) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   std::string key = ConvertJavaStringToUTF8(env, passphrase);
   sync_service_->SetEncryptionPassphrase(key, ProfileSyncService::EXPLICIT);
 }
@@ skipping 209 matching lines @@
 static jlong Init(JNIEnv* env, const JavaParamRef<jobject>& obj) {
   ProfileSyncServiceAndroid* profile_sync_service_android =
       new ProfileSyncServiceAndroid(env, obj);
   if (profile_sync_service_android->Init()) {
     return reinterpret_cast<intptr_t>(profile_sync_service_android);
   } else {
     delete profile_sync_service_android;
     return 0;
   }
 }