Add missing using statements for JNI types.

chrome/browser/android/ntp/new_tab_page_prefs.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/android/ntp/new_tab_page_prefs.h"
 
 #include <jni.h>
 
 #include "base/android/jni_string.h"
 #include "chrome/browser/profiles/profile_android.h"
 #include "chrome/common/pref_names.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "components/prefs/pref_service.h"
 #include "components/prefs/scoped_user_pref_update.h"
 #include "jni/NewTabPagePrefs_jni.h"
 
 using base::android::ConvertJavaStringToUTF8;
+using base::android::JavaParamRef;
 
 static jlong Init(JNIEnv* env,
                   const JavaParamRef<jclass>& clazz,
                   const JavaParamRef<jobject>& profile) {
   NewTabPagePrefs* new_tab_page_prefs =
       new NewTabPagePrefs(ProfileAndroid::FromProfileAndroid(profile));
   return reinterpret_cast<intptr_t>(new_tab_page_prefs);
 }
 
 NewTabPagePrefs::NewTabPagePrefs(Profile* profile)
@@ skipping 95 matching lines @@
   registry->RegisterBooleanPref(prefs::kNtpCollapsedSnapshotDocument, false);
   registry->RegisterBooleanPref(prefs::kNtpCollapsedRecentlyClosedTabs, false);
   registry->RegisterBooleanPref(prefs::kNtpCollapsedSyncPromo, false);
   registry->RegisterDictionaryPref(prefs::kNtpCollapsedForeignSessions);
 }
 
 // static
 bool NewTabPagePrefs::RegisterNewTabPagePrefs(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }