Remove deprecated ListValue::Append(Value*) overload on Linux.

chrome/browser/net/referrer.cc

Index: chrome/browser/net/referrer.cc
diff --git a/chrome/browser/net/referrer.cc b/chrome/browser/net/referrer.cc
index 50e7c542d066bce74a9d80de80aaaa58facbefb5..b72b6f2766e6bac6d9402f88dc68e36916739e69 100644
--- a/chrome/browser/net/referrer.cc
+++ b/chrome/browser/net/referrer.cc
@@ -12,6 +12,7 @@
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
+#include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/values.h"
 #include "chrome/browser/net/predictor.h"
@@ -132,16 +133,11 @@ void Referrer::Deserialize(const base::Value& value) {
   }
 }
 
-base::Value* Referrer::Serialize() const {
-  base::ListValue* subresource_list(new base::ListValue);
+std::unique_ptr<base::ListValue> Referrer::Serialize() const {
+  auto subresource_list = base::MakeUnique<base::ListValue>();
   for (const_iterator it = begin(); it != end(); ++it) {
-    std::unique_ptr<base::StringValue> url_spec(
-        new base::StringValue(it->first.spec()));
-    std::unique_ptr<base::FundamentalValue> rate(
-        new base::FundamentalValue(it->second.subresource_use_rate()));
-
-    subresource_list->Append(std::move(url_spec));
-    subresource_list->Append(std::move(rate));
+    subresource_list->AppendString(it->first.spec());
+    subresource_list->AppendDouble(it->second.subresource_use_rate());
   }
   return subresource_list;
 }