Stop relying on using statements in the JNI generator.

base/android/jni_generator/testFromJavaP.golden

 // 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.
 
 // This file is autogenerated by
 //     base/android/jni_generator/jni_generator.py
 // For
 //     java/io/InputStream
 
 #ifndef java_io_InputStream_JNI
@@ skipping 203 matching lines @@
       &g_InputStream_skip);
 
   jlong ret =
       env->CallLongMethod(obj,
           method_id, p0);
   jni_generator::CheckException(env);
   return ret;
 }
 
 static base::subtle::AtomicWord g_InputStream_Constructor = 0;
-static ScopedJavaLocalRef<jobject> Java_InputStream_Constructor(JNIEnv* env)
-    __attribute__ ((unused));
-static ScopedJavaLocalRef<jobject> Java_InputStream_Constructor(JNIEnv* env) {
+static base::android::ScopedJavaLocalRef<jobject>
+    Java_InputStream_Constructor(JNIEnv* env) __attribute__ ((unused));
+static base::android::ScopedJavaLocalRef<jobject>
+    Java_InputStream_Constructor(JNIEnv* env) {
   CHECK_CLAZZ(env, InputStream_clazz(env),
       InputStream_clazz(env), NULL);
   jmethodID method_id =
       base::android::MethodID::LazyGet<
       base::android::MethodID::TYPE_INSTANCE>(
       env, InputStream_clazz(env),
       "<init>",
       "()V",
       &g_InputStream_Constructor);
 
   jobject ret =
       env->NewObject(InputStream_clazz(env),
           method_id);
   jni_generator::CheckException(env);
-  return ScopedJavaLocalRef<jobject>(env, ret);
+  return base::android::ScopedJavaLocalRef<jobject>(env, ret);
 }
 
 // Step 3: RegisterNatives.
 
 }  // namespace JNI_InputStream
 
 #endif  // java_io_InputStream_JNI