Add missing using statements for JNI types.

chrome/browser/android/omnibox/answers_image_bridge.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 "chrome/browser/android/omnibox/answers_image_bridge.h"
 
 #include <jni.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/bind.h"
 #include "chrome/browser/bitmap_fetcher/bitmap_fetcher_service.h"
 #include "chrome/browser/bitmap_fetcher/bitmap_fetcher_service_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_android.h"
 #include "jni/AnswersImage_jni.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/gfx/android/java_bitmap.h"
 #include "url/gurl.h"
 
+using base::android::JavaParamRef;
 using base::android::ScopedJavaLocalRef;
 using base::android::ConvertUTF8ToJavaString;
 
 namespace {
 
 class AnswersImageObserverAndroid : public BitmapFetcherService::Observer {
  public:
   explicit AnswersImageObserverAndroid(JNIEnv* env,
                                        jobject java_answers_image_observer) {
     java_answers_image_observer_.Reset(env, java_answers_image_observer);
@@ skipping 42 matching lines @@
   std::string url;
   base::android::ConvertJavaStringToUTF8(env, java_url, &url);
   return bitmap_fetcher_service->RequestImage(
       GURL(url), new AnswersImageObserverAndroid(env, java_callback));
 }
 
 // static
 bool RegisterAnswersImageBridge(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }