Add missing using statements for JNI types.

chrome/browser/android/omnibox/omnibox_prerender.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/omnibox/omnibox_prerender.h"
 
 #include "base/android/jni_string.h"
 #include "base/logging.h"
 #include "chrome/browser/android/tab_android.h"
 #include "chrome/browser/predictors/autocomplete_action_predictor.h"
 #include "chrome/browser/predictors/autocomplete_action_predictor_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_android.h"
 #include "chrome/browser/ui/search/instant_search_prerenderer.h"
 #include "components/omnibox/browser/autocomplete_match.h"
 #include "components/omnibox/browser/autocomplete_result.h"
 #include "content/public/browser/web_contents.h"
 #include "jni/OmniboxPrerender_jni.h"
 #include "url/gurl.h"
 
+using base::android::JavaParamRef;
 using predictors::AutocompleteActionPredictor;
 using predictors::AutocompleteActionPredictorFactory;
 
 OmniboxPrerender::OmniboxPrerender(JNIEnv* env, jobject obj)
     : weak_java_omnibox_(env, obj) {
 }
 
 OmniboxPrerender::~OmniboxPrerender() {
 }
 
@@ skipping 120 matching lines @@
         web_contents->GetController().GetDefaultSessionStorageNamespace(),
         container_bounds.size());
     return;
   }
   predictors::AutocompleteActionPredictorFactory::GetForProfile(profile)->
       StartPrerendering(
           match.destination_url,
           web_contents->GetController().GetDefaultSessionStorageNamespace(),
           container_bounds.size());
 }