Add missing using statements for JNI types.

chrome/browser/media/android/cdm/media_drm_credential_manager.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/media/android/cdm/media_drm_credential_manager.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/browser_process.h"
 #include "content/public/browser/android/provision_fetcher_factory.h"
 #include "jni/MediaDrmCredentialManager_jni.h"
 #include "media/base/android/media_drm_bridge.h"
 #include "media/base/android/provision_fetcher.h"
 #include "url/gurl.h"
 
 #include "widevine_cdm_version.h"  // In SHARED_INTERMEDIATE_DIR.
 
+using base::android::JavaParamRef;
 using base::android::ScopedJavaGlobalRef;
 
 namespace {
 
 void MediaDrmCredentialManagerCallback(
     const ScopedJavaGlobalRef<jobject>& j_media_drm_credential_manager_callback,
     bool succeeded) {
   JNIEnv* env = base::android::AttachCurrentThread();
   Java_MediaDrmCredentialManagerCallback_onCredentialResetFinished(
       env, j_media_drm_credential_manager_callback.obj(), succeeded);
@@ skipping 74 matching lines @@
     return;
   }
 
   media_drm_bridge_->ResetDeviceCredentials(reset_credentials_cb);
 }
 
 // static
 bool MediaDrmCredentialManager::RegisterMediaDrmCredentialManager(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }