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

chrome/browser/renderer_host/render_view_host.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/renderer_host/render_view_host.h"
 
 #include <string>
 #include <utility>
 #include <vector>
 
@@ skipping 1246 matching lines @@
 
 void RenderViewHost::ContextMenuClosed(
     const webkit_glue::CustomContextMenuContext& custom_context) {
   Send(new ViewMsg_ContextMenuClosed(routing_id(), custom_context));
 }
 
 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,
     const SkBitmap& image,
     const gfx::Point& image_offset) {
   RenderViewHostDelegate::View* view = delegate_->GetViewDelegate();
   if (view)
       view->StartDragging(drop_data, drag_operations_mask, image, image_offset);
 }
 
@@ skipping 436 matching lines @@
     LOG(DFATAL) << "Invalid checked state " << checked_state;
     return;
   }
 
   CommandState state;
   state.is_enabled = is_enabled;
   state.checked_state =
       static_cast<RenderViewCommandCheckedState>(checked_state);
   command_states_[static_cast<RenderViewCommand>(command)] = state;
 }