Add missing using statements for JNI types.

chrome/browser/android/signin/signin_manager_android.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 <vector>
 
 #include "chrome/browser/android/signin/signin_manager_android.h"
 
 #include "base/android/callback_android.h"
 #include "base/android/jni_android.h"
@@ skipping 28 matching lines @@
 #include "components/signin/core/browser/profile_oauth2_token_service.h"
 #include "components/signin/core/browser/signin_manager.h"
 #include "components/signin/core/browser/signin_metrics.h"
 #include "components/signin/core/common/profile_management_switches.h"
 #include "components/signin/core/common/signin_pref_names.h"
 #include "google_apis/gaia/gaia_auth_util.h"
 #include "google_apis/gaia/gaia_constants.h"
 #include "jni/SigninManager_jni.h"
 #include "net/url_request/url_request_context_getter.h"
 
+using base::android::JavaParamRef;
 using bookmarks::BookmarkModel;
 
 namespace {
 
 // A BrowsingDataRemover::Observer that clears all Profile data and then
 // invokes a callback and deletes itself.
 class ProfileDataRemover : public BrowsingDataRemover::Observer {
  public:
   ProfileDataRemover(Profile* profile, const base::Closure& callback)
       : callback_(callback),
@@ skipping 279 matching lines @@
     const JavaParamRef<jstring>& j_email) {
   std::string email = base::android::ConvertJavaStringToUTF8(env, j_email);
   std::string domain = gaia::ExtractDomainName(email);
   return base::android::ConvertUTF8ToJavaString(env, domain);
 }
 
 // static
 bool SigninManagerAndroid::Register(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }