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

chrome/common/render_messages_internal.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.
 
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "build/build_config.h"
@@ skipping 113 matching lines @@
 // Tells the renderer to perform the given action on the media player
 // located at the given point.
 IPC_MESSAGE_ROUTED2(ViewMsg_MediaPlayerActionAt,
                     gfx::Point, /* location */
                     WebKit::WebMediaPlayerAction)
 
 IPC_MESSAGE_ROUTED0(ViewMsg_PrintNodeUnderContextMenu)
 
 // Tells the renderer to print the print preview tab's PDF plugin without
 // showing the print dialog.
-IPC_MESSAGE_ROUTED0(ViewMsg_PrintForPrintPreview)
+IPC_MESSAGE_ROUTED1(ViewMsg_PrintForPrintPreview,
+                    DictionaryValue /* settings*/)
 
 // Tells the render view to close.
 IPC_MESSAGE_ROUTED0(ViewMsg_Close)
 
 // Tells the render view to change its size.  A ViewHostMsg_PaintRect message
 // is generated in response provided new_size is not empty and not equal to
 // the view's current size.  The generated ViewHostMsg_PaintRect message will
 // have the IS_RESIZE_ACK flag set. It also receives the resizer rect so that
 // we don't have to fetch it every time WebKit asks for it.
 IPC_MESSAGE_ROUTED2(ViewMsg_Resize,
@@ skipping 1556 matching lines @@
 // Sends back to the browser the rendered "printed page" that was requested by
 // a ViewMsg_PrintPage message or from scripted printing. The memory handle in
 // this message is already valid in the browser process.
 IPC_MESSAGE_ROUTED1(ViewHostMsg_DidPrintPage,
                     ViewHostMsg_DidPrintPage_Params /* page content */)
 
 // The renderer wants to know the default print settings.
 IPC_SYNC_MESSAGE_ROUTED0_1(ViewHostMsg_GetDefaultPrintSettings,
                            ViewMsg_Print_Params /* default_settings */)
 
+// The renderer wants to update the current print settings with new
+// |job_settings|.
+IPC_SYNC_MESSAGE_ROUTED2_1(ViewHostMsg_UpdatePrintSettings,
+                           int /* document_cookie */,
+                           DictionaryValue /* job_settings */,
+                           ViewMsg_Print_Params /* current_settings */)
+
 // It's the renderer that controls the printing process when it is generated
 // by javascript. This step is about showing UI to the user to select the
 // final print settings. The output parameter is the same as
 // ViewMsg_PrintPages which is executed implicitly.
 IPC_SYNC_MESSAGE_ROUTED1_1(ViewHostMsg_ScriptedPrint,
                            ViewHostMsg_ScriptedPrint_Params,
                            ViewMsg_PrintPages_Params
                                /* settings chosen by the user*/)
 
 // WebKit and JavaScript error messages to log to the console
@@ skipping 820 matching lines @@
 // while performing stress testing.
 IPC_MESSAGE_ROUTED2(ViewMsg_JavaScriptStressTestControl,
                     int /* cmd */,
                     int /* param */)
 
 // Register a new handler for URL requests with the given scheme.
 IPC_MESSAGE_ROUTED3(ViewHostMsg_RegisterProtocolHandler,
                     std::string /* scheme */,
                     GURL /* url */,
                     string16 /* title */)