Use document from preview for System Dialog printing on Windows.

chrome/renderer/chrome_mock_render_thread.cc

Index: chrome/renderer/chrome_mock_render_thread.cc
diff --git a/chrome/renderer/chrome_mock_render_thread.cc b/chrome/renderer/chrome_mock_render_thread.cc
index c58d3ebe140289c1bf6dd1961e43df111de50856..c3b8efddd9424d982966790a0ee6a97a89953284 100644
--- a/chrome/renderer/chrome_mock_render_thread.cc
+++ b/chrome/renderer/chrome_mock_render_thread.cc
@@ -160,9 +160,13 @@ void ChromeMockRenderThread::OnCheckForCancel(int32 preview_ui_id,
 }
 
 void ChromeMockRenderThread::OnUpdatePrintSettings(
+    int render_view_id,
     int document_cookie,
     const base::DictionaryValue& job_settings,
-    PrintMsg_PrintPages_Params* params) {
+    PrintMsg_PrintPages_Params* params,
+    bool* canceled) {
+  if (canceled)
+    *canceled = false;
   // Check and make sure the required settings are all there.
   // We don't actually care about the values.
   std::string dummy_string;