Added a test that currently is able to print to pdf.

chrome/browser/ui/webui/print_preview/print_preview_ui.h

Index: chrome/browser/ui/webui/print_preview/print_preview_ui.h
diff --git a/chrome/browser/ui/webui/print_preview/print_preview_ui.h b/chrome/browser/ui/webui/print_preview/print_preview_ui.h
index 7f32261dad683cb41ea074ec27d46de9b11e7d86..db2b26c17156fe619b0ecbad76eb737e31ac6eda 100644
--- a/chrome/browser/ui/webui/print_preview/print_preview_ui.h
+++ b/chrome/browser/ui/webui/print_preview/print_preview_ui.h
@@ -156,6 +156,7 @@ class PrintPreviewUI : public ConstrainedWebDialogUI {
 
  private:
   friend class PrintPreviewHandlerTest;
+  friend class PrintPreviewPdfGeneratedBrowserTest;
   FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest, StickyMarginsCustom);
   FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest, StickyMarginsDefault);
   FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest,
@@ -166,6 +167,8 @@ class PrintPreviewUI : public ConstrainedWebDialogUI {
                            GetLastUsedMarginSettingsDefault);
   FRIEND_TEST_ALL_PREFIXES(PrintPreviewDialogControllerUnitTest,
                            TitleAfterReload);
+  FRIEND_TEST_ALL_PREFIXES(PrintPreviewPdfGeneratedBrowserTest,

[Lei Zhang, 2014/07/08 01:11:37]

Maybe just add a public SetSelectedFileForTesting method and use that instead of
being a friend, since that's the one thing you need to be a friend for. You
probably can also drop the friend in print_preview_handler.h.

+                           DummyTest);
 
   // Returns the Singleton instance of the PrintPreviewDataService.
   PrintPreviewDataService* print_preview_data_service();