PrintPreview: Make ctrl-shift-p start the native print flow.

chrome/browser/ui/webui/print_preview_ui.cc

Index: chrome/browser/ui/webui/print_preview_ui.cc
diff --git a/chrome/browser/ui/webui/print_preview_ui.cc b/chrome/browser/ui/webui/print_preview_ui.cc
index 7e087e67ba34387e1336c419f1848c64a277fc90..9d18e0040bbae84b21735fb8cd96ae8c2544007c 100644
--- a/chrome/browser/ui/webui/print_preview_ui.cc
+++ b/chrome/browser/ui/webui/print_preview_ui.cc
@@ -146,6 +146,10 @@ void PrintPreviewUI::OnPrintPreviewRequest(int request_id) {
   g_print_preview_request_id_map.Get().Set(preview_ui_addr_str_, request_id);
 }
 
+void PrintPreviewUI::OnShowSystemDialog() {
+  CallJavascriptFunction("onSystemDialogLinkClicked");
+}
+
 void PrintPreviewUI::OnDidGetPreviewPageCount(
     const PrintHostMsg_DidGetPreviewPageCount_Params& params) {
   DCHECK_GT(params.page_count, 0);
@@ -219,6 +223,10 @@ void PrintPreviewUI::OnFileSelectionCancelled() {
   CallJavascriptFunction("fileSelectionCancelled");
 }
 
+void PrintPreviewUI::OnCancelPendingPreviewRequest() {
+  g_print_preview_request_id_map.Get().Set(preview_ui_addr_str_, -1);
+}
+
 void PrintPreviewUI::OnPrintPreviewFailed() {
   CallJavascriptFunction("printPreviewFailed");
 }