Use std::unique_ptr<base::Value> in V8ValueConverter.

content/renderer/dom_automation_controller.cc

 // Copyright (c) 2012 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/renderer/dom_automation_controller.h"
 
 #include "base/json/json_string_value_serializer.h"
 #include "base/strings/string_util.h"
 #include "content/child/v8_value_converter_impl.h"
 #include "content/common/child_process_messages.h"
@@ skipping 84 matching lines @@
   // Warning: note that JSON officially requires the root-level object to be
   // an object (e.g. {foo:3}) or an array, while here we're serializing
   // strings, bools, etc. to "JSON".  This only works because (a) the JSON
   // writer is lenient, and (b) on the receiving side we wrap the JSON string
   // in square brackets, converting it to an array, then parsing it and
   // grabbing the 0th element to get the value out.
   if (!args.PeekNext().IsEmpty() &&
       (args.PeekNext()->IsString() || args.PeekNext()->IsBoolean() ||
        args.PeekNext()->IsNumber())) {
     V8ValueConverterImpl conv;
-    value.reset(
-        conv.FromV8Value(args.PeekNext(), args.isolate()->GetCurrentContext()));
+    value =
+        conv.FromV8Value(args.PeekNext(), args.isolate()->GetCurrentContext());
   } else {
     return false;
   }
 
   if (!serializer.Serialize(*value))
     return false;
 
   bool succeeded = Send(new FrameHostMsg_DomOperationResponse(
       routing_id(), json));
 
@@ skipping 21 matching lines @@
   return Send(
       new FrameHostMsg_DomOperationResponse(routing_id(), str));
 }
 
 bool DomAutomationController::SetAutomationId(int automation_id) {
   automation_id_ = automation_id;
   return true;
 }
 
 }  // namespace content