Update print preview test to not use CallJavascriptFunctionUnsafe

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 722c3168e2f8b510143fea1bf8aa4019ea4c701e..76f5acd9a9abb80ca2dbe7385e79b2897ac861d5 100644
--- a/chrome/browser/ui/webui/print_preview/print_preview_ui.h
+++ b/chrome/browser/ui/webui/print_preview/print_preview_ui.h
@@ -23,6 +23,7 @@ struct PrintHostMsg_RequestPrintPreview_Params;
 struct PrintHostMsg_SetOptionsFromDocument_Params;
 
 namespace base {
+class DictionaryValue;
 class FilePath;
 class RefCountedBytes;
 }
@@ -158,6 +159,14 @@ class PrintPreviewUI : public ConstrainedWebDialogUI {
   // Passes |closure| to PrintPreviewHandler::SetPdfSavedClosureForTesting().
   void SetPdfSavedClosureForTesting(const base::Closure& closure);
 
+  // Tell the handler to send the enable-manipulate-settings-for-test WebUI
+  // event.
+  void SendEnableManipulateSettingsForTest();
+
+  // Tell the handler to send the manipulate-settings-for-test WebUI event
+  // to set the print preview settings contained in |settings|.
+  void SendManipulateSettingsForTest(const base::DictionaryValue& settings);
+
  private:
   FRIEND_TEST_ALL_PREFIXES(PrintPreviewDialogControllerUnitTest,
                            TitleAfterReload);