Assertion removed in print_preview_pdf_generated.cc.

chrome/browser/ui/webui/print_preview/print_preview_handler.cc

 // Copyright (c) 2012 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/ui/webui/print_preview/print_preview_handler.h"
 
 #include <ctype.h>
 
 #include <map>
 #include <string>
@@ skipping 260 matching lines @@
 
   bool external_preview = false;
   if (settings.GetBoolean(printing::kSettingOpenPDFInPreview,
                           &external_preview) && external_preview) {
     ReportPrintSettingHistogram(EXTERNAL_PDF_PREVIEW);
   }
 }
 
 // Callback that stores a PDF file on disk.
 void PrintToPdfCallback(printing::Metafile* metafile,
-                        const base::FilePath& path) {
+                        const base::FilePath& path,
+                        const base::Closure& pdf_file_saved_callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
   metafile->SaveTo(path);
   // |metafile| must be deleted on the UI thread.
   BrowserThread::DeleteSoon(BrowserThread::UI, FROM_HERE, metafile);
+  pdf_file_saved_callback.Run();

[Lei Zhang, 2014/07/22 03:04:39]

What happens when you save to PDF outside of your test? Does this work when the
callback is "null" ?

[ivandavid, 2014/07/22 19:02:01]

Done.

 }
 
 std::string GetDefaultPrinterOnFileThread() {
   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
 
   scoped_refptr<printing::PrintBackend> print_backend(
       printing::PrintBackend::CreateInstance(NULL));
 
   std::string default_printer = print_backend->GetDefaultPrinterName();
   VLOG(1) << "Default Printer: " << default_printer;
@@ skipping 1069 matching lines @@
   scoped_refptr<base::RefCountedBytes> data;
   base::string16 title;
   if (!GetPreviewDataAndTitle(&data, &title)) {
     NOTREACHED() << "Preview data was checked before file dialog.";
     return;
   }
   scoped_ptr<printing::PreviewMetafile> metafile(new printing::PreviewMetafile);
   metafile->InitFromData(static_cast<const void*>(data->front()), data->size());
   BrowserThread::PostTask(
       BrowserThread::FILE, FROM_HERE,
-      base::Bind(&PrintToPdfCallback, metafile.release(), print_to_pdf_path_));
+      base::Bind(&PrintToPdfCallback,
+                 metafile.release(),
+                 print_to_pdf_path_,
+                 pdf_file_saved_callback_));
   print_to_pdf_path_ = base::FilePath();
   ClosePreviewDialog();
 }
 
 void PrintPreviewHandler::FileSelectionCanceled(void* params) {
   PrintPreviewUI* print_preview_ui = static_cast<PrintPreviewUI*>(
       web_ui()->GetController());
   print_preview_ui->OnFileSelectionCancelled();
 }
 
@@ skipping 238 matching lines @@
     reconcilor_ = AccountReconcilorFactory::GetForProfile(profile);
     if (reconcilor_)
       reconcilor_->AddMergeSessionObserver(this);
   }
 }
 
 void PrintPreviewHandler::UnregisterForMergeSession() {
   if (reconcilor_)
     reconcilor_->RemoveMergeSessionObserver(this);
 }
+
+void PrintPreviewHandler::SetPdfSavedCallbackForTesting(
+    const base::Closure& callback) {
+  pdf_file_saved_callback_ = callback;
+}