Reland of ExtensionFunction: don't pass ownership of base::Value by raw pointer.

extensions/browser/api/management/management_api.cc

Index: extensions/browser/api/management/management_api.cc
diff --git a/extensions/browser/api/management/management_api.cc b/extensions/browser/api/management/management_api.cc
index a1695195ab598e9f5e21203d3055dad04754d9ef..fc043c0a0cc88bc1a51e920661d85ad203a9a8c2 100644
--- a/extensions/browser/api/management/management_api.cc
+++ b/extensions/browser/api/management/management_api.cc
@@ -14,6 +14,7 @@
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/memory/linked_ptr.h"
+#include "base/memory/ptr_util.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
@@ -480,7 +481,7 @@
         ->Get(browser_context())
         ->GetDelegate()
         ->EnableExtension(browser_context(), extension_id_);
-    Respond(OneArgument(new base::FundamentalValue(true)));
+    Respond(OneArgument(base::MakeUnique<base::FundamentalValue>(true)));
   } else {
     Respond(Error(keys::kUserDidNotReEnableError));
   }