Adding functionality to print PDF embedded in the html page.

chrome/browser/printing/print_view_manager.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/printing/print_view_manager.h"
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
@@ skipping 106 matching lines @@
   if (print_preview_state_ != NOT_PREVIEWING) {
     NOTREACHED();
     return false;
   }
   print_preview_state_ = USER_INITIATED_PREVIEW;
   return PrintNowInternal(new PrintMsg_InitiatePrintPreview(routing_id()));
 }
 
 void PrintViewManager::PrintPreviewDone() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  DCHECK_NE(NOT_PREVIEWING, print_preview_state_);

[Lei Zhang, 2012/01/12 22:10:20]

Can you comment this out and add the following?
// TODO(thestig) Fix this. http://crbug.com/105640

 
   if (print_preview_state_ == SCRIPTED_PREVIEW) {
     ScriptedPrintPreviewClosureMap& map =
         g_scripted_print_preview_closure_map.Get();
     ScriptedPrintPreviewClosureMap::iterator it =
         map.find(scripted_print_preview_rph_);
     CHECK(it != map.end());
     it->second.Run();
     map.erase(scripted_print_preview_rph_);
     scripted_print_preview_rph_ = NULL;
@@ skipping 455 matching lines @@
 }
 
 bool PrintViewManager::PrintNowInternal(IPC::Message* message) {
   // Don't print / print preview interstitials.
   if (web_contents()->ShowingInterstitialPage())
     return false;
   return Send(message);
 }
 
 }  // namespace printing