Don't set the request target type to object when navigating from a Pepper plug-in.

content/renderer/pepper/pepper_url_loader_host.cc

Index: content/renderer/pepper/pepper_url_loader_host.cc
diff --git a/content/renderer/pepper/pepper_url_loader_host.cc b/content/renderer/pepper/pepper_url_loader_host.cc
index 8343f1934eac238412cbecf3e05912718c9a6886..f1d2fc07817f31b3a819856d19e0684f6f8cb573 100644
--- a/content/renderer/pepper/pepper_url_loader_host.cc
+++ b/content/renderer/pepper/pepper_url_loader_host.cc
@@ -250,7 +250,10 @@ int32_t PepperURLLoaderHost::InternalOnHostMsgOpen(
   if (!frame)
     return PP_ERROR_FAILED;
   WebURLRequest web_request;
-  if (!CreateWebURLRequest(&filled_in_request_data, frame, &web_request))
+  if (!CreateWebURLRequest(&filled_in_request_data,
+                           WebURLRequest::TargetIsObject,
+                           frame,
+                           &web_request))
     return PP_ERROR_FAILED;
   web_request.setRequestorProcessID(renderer_ppapi_host_->GetPluginPID());