[Content] Allow V8ValueConverter to convert -0 to an integer

extensions/renderer/send_request_natives.cc

 // Copyright 2014 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 "extensions/renderer/send_request_natives.h"
 
 #include <stdint.h>
 
 #include "base/json/json_reader.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 30 matching lines @@
 
   int request_id = request_sender_->GetNextRequestId();
   args.GetReturnValue().Set(static_cast<int32_t>(request_id));
 
   std::unique_ptr<V8ValueConverter> converter(V8ValueConverter::create());
 
   // See http://crbug.com/149880. The context menus APIs relies on this, but
   // we shouldn't really be doing it (e.g. for the sake of the storage API).
   converter->SetFunctionAllowed(true);
 
+  // See http://crbug.com/694248.
+  converter->SetConvertNegativeZeroToInt(true);
+
   if (!preserve_null_in_objects)
     converter->SetStripNullFromObjects(true);
 
   std::unique_ptr<base::Value> value_args(
       converter->FromV8Value(args[1], context()->v8_context()));
   if (!value_args.get() || !value_args->IsType(base::Value::Type::LIST)) {
     NOTREACHED() << "Unable to convert args passed to StartRequest";
     return;
   }
 
@@ skipping 17 matching lines @@
   CHECK(args[0]->IsObject());
   v8::Local<v8::Context> v8_context =
       v8::Local<v8::Object>::Cast(args[0])->CreationContext();
   if (ContextCanAccessObject(context()->v8_context(), v8_context->Global(),
                              false)) {
     args.GetReturnValue().Set(v8_context->Global());
   }
 }
 
 }  // namespace extensions