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

extensions/renderer/send_request_natives.cc

Index: extensions/renderer/send_request_natives.cc
diff --git a/extensions/renderer/send_request_natives.cc b/extensions/renderer/send_request_natives.cc
index 4a3281417e0bc64d0c6222cf236ac95a850acc47..5824bc0ea2b998445db8c2b3635977dda6ecc8d9 100644
--- a/extensions/renderer/send_request_natives.cc
+++ b/extensions/renderer/send_request_natives.cc
@@ -48,6 +48,9 @@ void SendRequestNatives::StartRequest(
   // 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);