Printing: PDFs should only be fit to page if there is a size mismatch.

pdf/pdf_engine.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 PDF_PDF_ENGINE_H_
 #define PDF_PDF_ENGINE_H_
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
@@ skipping 234 matching lines @@
   virtual void OnCallback(int id) = 0;
   // Gets the JSON representation of the PDF file
   virtual std::string GetPageAsJSON(int index) = 0;
   // Gets the PDF document's print scaling preference. True if the document can
   // be scaled to fit.
   virtual bool GetPrintScaling() = 0;
   // Returns number of copies to be printed.
   virtual int GetCopiesToPrint() = 0;
   // Returns the duplex setting.
   virtual int GetDuplexType() = 0;
+  // Returns true if all the pages are the same size.
+  virtual bool GetPageSizeAndUniformity(pp::Size* size) = 0;
 
   // Returns a VarArray of Bookmarks, each a VarDictionary containing the
   // following key/values:
   // - "title" - a string Var.
   // - "page" - an int Var.
   // - "children" - a VarArray(), with each entry containing a VarDictionary of
   //   the same structure.
   virtual pp::VarArray GetBookmarks() = 0;
 
   // Append blank pages to make a 1-page document to a |num_pages| document.
@@ skipping 64 matching lines @@
 
   // See the definition of GetPDFPageSizeByIndex in pdf.cc for details.
   virtual bool GetPDFPageSizeByIndex(const void* pdf_buffer,
                                      int pdf_buffer_size, int page_number,
                                      double* width, double* height) = 0;
 };
 
 }  // namespace chrome_pdf
 
 #endif  // PDF_PDF_ENGINE_H_