Convert JsonWriter::Write to taking a const ref for the in-param

content/browser/android/tracing_controller_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 "content/browser/android/tracing_controller_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/json/json_writer.h"
 #include "base/logging.h"
@@ skipping 73 matching lines @@
   if (!TracingController::GetInstance()->GetCategories(
           base::Bind(&TracingControllerAndroid::OnKnownCategoriesReceived,
                      weak_factory_.GetWeakPtr()))) {
     return false;
   }
   return true;
 }
 
 void TracingControllerAndroid::OnKnownCategoriesReceived(
     const std::set<std::string>& categories_received) {
-  scoped_ptr<base::ListValue> category_list(new base::ListValue());
+  base::ListValue category_list;
   for (std::set<std::string>::const_iterator it = categories_received.begin();
        it != categories_received.end();
        ++it) {
-    category_list->AppendString(*it);
+    category_list.AppendString(*it);
   }
   std::string received_category_list;
-  base::JSONWriter::Write(category_list.get(), &received_category_list);
+  base::JSONWriter::Write(category_list, &received_category_list);
 
   // This log is required by adb_profile_chrome.py.
   LOG(WARNING) << "{\"traceCategoriesList\": " << received_category_list << "}";
 }
 
 static jstring GetDefaultCategories(JNIEnv* env, jobject obj) {
   return base::android::ConvertUTF8ToJavaString(
              env,
              base::trace_event::CategoryFilter::kDefaultCategoryFilterString)
       .Release();
 }
 
 bool RegisterTracingControllerAndroid(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace content