Add missing using statements for JNI types.

ui/gfx/android/view_configuration.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 "ui/gfx/android/view_configuration.h"
 
 #include "base/android/context_utils.h"
 #include "base/android/jni_android.h"
 #include "base/lazy_instance.h"
 #include "base/macros.h"
 #include "base/threading/non_thread_safe.h"
 #include "jni/ViewConfigurationHelper_jni.h"
 
 using base::android::AttachCurrentThread;
 using base::android::GetApplicationContext;
+using base::android::JavaParamRef;
 
 namespace gfx {
 
 namespace {
 
 struct ViewConfigurationData {
   ViewConfigurationData()
       : double_tap_timeout_in_ms_(0),
         long_press_timeout_in_ms_(0),
         tap_timeout_in_ms_(0),
@@ skipping 153 matching lines @@
 
 int ViewConfiguration::GetMinScalingSpanInDips() {
   return g_view_configuration.Get().min_scaling_span_in_dips();
 }
 
 bool ViewConfiguration::RegisterViewConfiguration(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace gfx