Add missing using statements for JNI types.

content/browser/android/date_time_chooser_android.cc

 // Copyright (c) 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 "content/browser/android/date_time_chooser_android.h"
 
 #include <stddef.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/i18n/char_iterator.h"
 #include "content/common/date_time_suggestion.h"
 #include "content/common/view_messages.h"
 #include "content/public/browser/render_view_host.h"
 #include "jni/DateTimeChooserAndroid_jni.h"
 #include "third_party/icu/source/common/unicode/uchar.h"
 #include "third_party/icu/source/common/unicode/unistr.h"
 #include "ui/android/window_android.h"
 
 using base::android::AttachCurrentThread;
 using base::android::ConvertJavaStringToUTF16;
 using base::android::ConvertUTF8ToJavaString;
 using base::android::ConvertUTF16ToJavaString;
 using base::android::JavaRef;
-
+using base::android::ScopedJavaLocalRef;
 
 namespace {
 
 base::string16 SanitizeSuggestionString(const base::string16& string) {
   base::string16 trimmed = string.substr(0, 255);
   icu::UnicodeString sanitized;
   base::i18n::UTF16CharIterator sanitized_iterator(&trimmed);
   while (!sanitized_iterator.end()) {
     UChar c = sanitized_iterator.get();
     if (u_isprint(c))
@@ skipping 72 matching lines @@
 }
 
 // ----------------------------------------------------------------------------
 // Native JNI methods
 // ----------------------------------------------------------------------------
 bool RegisterDateTimeChooserAndroid(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace content