Assertion removed in print_preview_pdf_generated.cc.

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

Index: chrome/browser/ui/webui/print_preview/print_preview_handler.cc
diff --git a/chrome/browser/ui/webui/print_preview/print_preview_handler.cc b/chrome/browser/ui/webui/print_preview/print_preview_handler.cc
index 86ee312de2523d6cdec431d45fdeac0d8f56af72..18fb280fd917dd8baaa0ce8018824e0780ab05db 100644
--- a/chrome/browser/ui/webui/print_preview/print_preview_handler.cc
+++ b/chrome/browser/ui/webui/print_preview/print_preview_handler.cc
@@ -278,11 +278,13 @@ void ReportPrintSettingsStats(const base::DictionaryValue& settings) {
 
 // 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() {
@@ -1372,7 +1374,10 @@ void PrintPreviewHandler::PostPrintToPdfTask() {
   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();
 }
@@ -1631,3 +1636,8 @@ void PrintPreviewHandler::UnregisterForMergeSession() {
   if (reconcilor_)
     reconcilor_->RemoveMergeSessionObserver(this);
 }
+
+void PrintPreviewHandler::SetPdfSavedCallbackForTesting(
+    const base::Closure& callback) {
+  pdf_file_saved_callback_ = callback;
+}