Add missing using statements for JNI types.

components/gcm_driver/gcm_driver_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 "components/gcm_driver/gcm_driver_android.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/android/context_utils.h"
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "jni/GCMDriver_jni.h"
 
 using base::android::AppendJavaStringArrayToStringVector;
 using base::android::AttachCurrentThread;
 using base::android::ConvertJavaStringToUTF8;
 using base::android::ConvertUTF8ToJavaString;
 using base::android::JavaByteArrayToByteVector;
+using base::android::JavaParamRef;
 
 namespace gcm {
 
  GCMDriverAndroid::GCMDriverAndroid(
      const base::FilePath& store_path,
      const scoped_refptr<base::SequencedTaskRunner>& blocking_task_runner)
      : GCMDriver(store_path, blocking_task_runner),
        recorder_(this) {
   JNIEnv* env = AttachCurrentThread();
   java_ref_.Reset(
@@ skipping 226 matching lines @@
   NOTIMPLEMENTED();
 }
 
 void GCMDriverAndroid::RecordDecryptionFailure(
     const std::string& app_id,
     GCMEncryptionProvider::DecryptionResult result) {
   recorder_.RecordDecryptionFailure(app_id, result);
 }
 
 }  // namespace gcm