Add missing using statements for JNI types.

device/gamepad/gamepad_platform_data_fetcher_android.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 "device/gamepad/gamepad_platform_data_fetcher_android.h"
 
 #include <stddef.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/trace_event/trace_event.h"
 
 #include "jni/GamepadList_jni.h"
 
 #include "third_party/WebKit/public/platform/WebGamepads.h"
 
 using base::android::AttachCurrentThread;
 using base::android::CheckException;
 using base::android::ClearException;
 using base::android::ConvertJavaStringToUTF8;
+using base::android::JavaParamRef;
 using base::android::ScopedJavaLocalRef;
 using blink::WebGamepad;
 using blink::WebGamepads;
 
 namespace device {
 
 bool GamepadPlatformDataFetcherAndroid::
     RegisterGamepadPlatformDataFetcherAndroid(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
@@ skipping 104 matching lines @@
                                static_cast<int>(WebGamepad::buttonsLengthCap));
 
   // Copy buttons state to the WebGamepad buttons[].
   for (unsigned int j = 0; j < pad.buttonsLength; j++) {
     pad.buttons[j].pressed = buttons[j];
     pad.buttons[j].value = buttons[j];
   }
 }
 
 }  // namespace device