Print Preview: Hook up the print button to initiate printing without displaying a print dialog.

chrome/browser/renderer_host/render_view_host.cc

Index: chrome/browser/renderer_host/render_view_host.cc
diff --git a/chrome/browser/renderer_host/render_view_host.cc b/chrome/browser/renderer_host/render_view_host.cc
index 756beee1d15f2b74e54e30e6a309176c0fc84d79..dc22005784b2916c4d01642d927c3bde5dd89f00 100644
--- a/chrome/browser/renderer_host/render_view_host.cc
+++ b/chrome/browser/renderer_host/render_view_host.cc
@@ -1264,6 +1264,10 @@ void RenderViewHost::PrintNodeUnderContextMenu() {
   Send(new ViewMsg_PrintNodeUnderContextMenu(routing_id()));
 }
 
+void RenderViewHost::PrintForPrintPreview(const std::string& job_settings) {
+  Send(new ViewMsg_PrintForPrintPreview(routing_id(), job_settings));
+}
+
 void RenderViewHost::OnMsgStartDragging(
     const WebDropData& drop_data,
     WebDragOperationsMask drag_operations_mask,