Update SupportsUserData uses with unique_ptr.

content/browser/android/java/gin_java_bridge_message_filter.cc

Index: content/browser/android/java/gin_java_bridge_message_filter.cc
diff --git a/content/browser/android/java/gin_java_bridge_message_filter.cc b/content/browser/android/java/gin_java_bridge_message_filter.cc
index 2506d0d7e2543bb5cd13ca202b8c09a6a722f02f..4e628c8c70bc838f5d59e9438988963f4e7a8955 100644
--- a/content/browser/android/java/gin_java_bridge_message_filter.cc
+++ b/content/browser/android/java/gin_java_bridge_message_filter.cc
@@ -94,9 +94,10 @@ scoped_refptr<GinJavaBridgeMessageFilter> GinJavaBridgeMessageFilter::FromHost(
   if (!filter && create_if_not_exists) {
     filter = new GinJavaBridgeMessageFilter();
     rph->AddFilter(filter.get());
-    rph->SetUserData(kGinJavaBridgeMessageFilterKey,
-                     new base::UserDataAdapter<GinJavaBridgeMessageFilter>(
-                         filter.get()));
+    rph->SetUserData(
+        kGinJavaBridgeMessageFilterKey,
+        base::MakeUnique<base::UserDataAdapter<GinJavaBridgeMessageFilter>>(
+            filter.get()));
   }
   return filter;
 }