Fixed issue with shrink output when using system print dialog.

chrome/renderer/print_web_view_helper.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_RENDERER_PRINT_WEB_VIEW_HELPER_H_
 #define CHROME_RENDERER_PRINT_WEB_VIEW_HELPER_H_
 #pragma once
 
 #include <vector>
 
@@ skipping 351 matching lines @@
 
   // Used for scripted initiated printing blocking.
   base::Time last_cancelled_script_print_;
   int user_cancelled_scripted_print_count_;
   bool is_scripted_printing_blocked_;
 
   // Let the browser process know of a printing failure. Only set to false when
   // the failure came from the browser in the first place.
   bool notify_browser_of_print_failure_;
 
+  // True, when priniting from print preview.

[Lei Zhang, 2012/04/13 21:49:40]

nit: Typo.

[gene, 2012/04/13 22:11:02]

Done.

+  bool printing_from_preview_;
+
   scoped_ptr<PrintMsg_PrintPages_Params> old_print_pages_params_;
 
   // Strings generated by the browser process to be printed as headers and
   // footers if requested by the user.
   scoped_ptr<base::DictionaryValue> header_footer_info_;
 
   // Keeps track of the state of print preview between messages.
   class PrintPreviewContext {
    public:
     PrintPreviewContext();
@@ skipping 90 matching lines @@
     enum PrintPreviewErrorBuckets error_;
 
     State state_;
   };
 
   PrintPreviewContext print_preview_context_;
   DISALLOW_COPY_AND_ASSIGN(PrintWebViewHelper);
 };
 
 #endif  // CHROME_RENDERER_PRINT_WEB_VIEW_HELPER_H_