Add a browser test that can communicate with the layout test framework and print pdfs.

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

 // 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_UI_H_
 
 #include <string>
 
+#include "base/files/file_path.h"

[Lei Zhang, 2014/07/17 00:30:37]

you can forward declare instead.

[ivandavid, 2014/07/17 20:49:20]

Done.

 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/time/time.h"
 #include "chrome/browser/ui/webui/constrained_web_dialog_ui.h"
 
 class PrintPreviewDataService;
 class PrintPreviewHandler;
 struct PrintHostMsg_DidGetPreviewPageCount_Params;
 struct PrintHostMsg_RequestPrintPreview_Params;
 
@@ skipping 31 matching lines @@
 
   // Returns the available draft page count.
   int GetAvailableDraftPageCount();
 
   // Setters
   void SetInitiatorTitle(const base::string16& initiator_title);
 
   base::string16 initiator_title() { return initiator_title_; }
 
   bool source_is_modifiable() { return source_is_modifiable_; }
 

[Lei Zhang, 2014/07/17 21:08:16]

no random whitespace changes please

   bool source_has_selection() { return source_has_selection_; }
 
   bool print_selection_only() { return print_selection_only_; }
 
   // Set initial settings for PrintPreviewUI.
   static void SetInitialParams(
       content::WebContents* print_preview_dialog,
       const PrintHostMsg_RequestPrintPreview_Params& params);
 
   // Determines whether to cancel a print preview request based on
@@ skipping 75 matching lines @@
   // also instructs the dialog to auto-cancel, which is used for testing only.
   class TestingDelegate {
    public:
     virtual bool IsAutoCancelEnabled() = 0;
     virtual void DidGetPreviewPageCount(int page_count) = 0;
     virtual void DidRenderPreviewPage(content::WebContents* preview_dialog) = 0;
   };
 
   static void SetDelegateForTesting(TestingDelegate* delegate);
 
+  // Allows for tests to set a file path to print a PDF to. This lso initiates

[Lei Zhang, 2014/07/17 00:30:37]

lso?

[ivandavid, 2014/07/17 20:49:21]

Oops, should be 'also.'

+  // the printing without having to click a button on the print preview dialog.
+  void SetSelectedFileForTesting(
+      const base::FilePath& path, int index, void* params);

[Lei Zhang, 2014/07/17 00:30:37]

|index| and |param| are ultimately unused. Omit them here so the caller doesn't
have to deal with it?

[ivandavid, 2014/07/17 20:49:20]

Done.

+
  private:
   friend class PrintPreviewHandlerTest;
   FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest, StickyMarginsCustom);
   FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest, StickyMarginsDefault);
   FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest,
                            StickyMarginsCustomThenDefault);
   FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest,
                            GetLastUsedMarginSettingsCustom);
   FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest,
                            GetLastUsedMarginSettingsDefault);
@@ skipping 25 matching lines @@
   // title.
   base::string16 initiator_title_;
 
   // Keeps track of whether OnClosePrintPreviewDialog() has been called or not.
   bool dialog_closed_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintPreviewUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_PRINT_PREVIEW_UI_H_