Print Preview: Fixing behavior of event listeners.

chrome/browser/printing/print_dialog_cloud.cc

Index: chrome/browser/printing/print_dialog_cloud.cc
diff --git a/chrome/browser/printing/print_dialog_cloud.cc b/chrome/browser/printing/print_dialog_cloud.cc
index fa20ad7f0c819fbd7c24711b36a37edb570f59b7..fe2e255bca93674713432a85f1078db23aec06b0 100644
--- a/chrome/browser/printing/print_dialog_cloud.cc
+++ b/chrome/browser/printing/print_dialog_cloud.cc
@@ -377,6 +377,8 @@ void CloudPrintFlowHandler::HandleSetPageParameters(const ListValue* args) {
   default_settings.desired_dpi = kDPI;
   default_settings.document_cookie = 0;
   default_settings.selection_only = false;
+  default_settings.preview_request_id = 0;
+  default_settings.is_first_request = true;
 
   if (!GetPageSetupParameters(json, default_settings)) {
     NOTREACHED();