Add missing using statements for JNI types.

ui/platform_window/android/platform_ime_controller_android.cc

 // Copyright 2015 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/platform_window/android/platform_ime_controller_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "jni/PlatformImeControllerAndroid_jni.h"
 
+using base::android::JavaParamRef;
+using base::android::ScopedJavaLocalRef;
+
 namespace ui {
 
 // static
 bool PlatformImeControllerAndroid::Register(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 PlatformImeControllerAndroid::PlatformImeControllerAndroid() {
 }
 
@@ skipping 29 matching lines @@
   JNIEnv* env = base::android::AttachCurrentThread();
   ScopedJavaLocalRef<jobject> scoped_obj =
       java_platform_ime_controller_android_.get(env);
   if (scoped_obj.is_null())
     return;
   Java_PlatformImeControllerAndroid_setImeVisibility(
       env, scoped_obj.obj(), visible);
 }
 
 }  // namespace ui