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

content/browser/renderer_host/render_view_host.h

 // 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 310 matching lines @@
   void MediaPlayerActionAt(const gfx::Point& location,
                            const WebKit::WebMediaPlayerAction& action);
 
   // Notifies the renderer that the context menu has closed.
   void ContextMenuClosed(
       const webkit_glue::CustomContextMenuContext& custom_context);
 
   // Prints the node that's under the context menu.
   void PrintNodeUnderContextMenu();
 
-  // Triggers printing of the preview PDF.
-  void PrintForPrintPreview();
+  // Triggers printing of the preview PDF. |job_settings| is a json string
+  // that contains print job settings information.
+  void PrintForPrintPreview(const std::string& job_settings);
 
   // Copies the image at the specified point.
   void CopyImageAt(int x, int y);
 
   // Notifies the renderer that a a drag operation that it started has ended,
   // either in a drop or by being cancelled.
   void DragSourceEndedAt(
       int client_x, int client_y, int screen_x, int screen_y,
       WebKit::WebDragOperation operation);
 
@@ skipping 389 matching lines @@
   // The termination status of the last render view that terminated.
   base::TerminationStatus render_view_termination_status_;
 
   // The enabled/disabled states of various commands.
   std::map<RenderViewCommand, CommandState> command_states_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewHost);
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_H_