Guarded shrink setting with ifdefs to make clear where it is used.

chrome/browser/printing/print_view_manager_base.cc

 // Copyright 2013 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.
 
 #include "chrome/browser/printing/print_view_manager_base.h"
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 202 matching lines @@
       TerminatePrintJob(true);
       web_contents()->Stop();
       return;
     }
   }
 #endif  // OS_WIN && !WIN_PDF_METAFILE_FOR_PRINTING
 
 #if !defined(WIN_PDF_METAFILE_FOR_PRINTING)
   // Update the rendered document. It will send notifications to the listener.
   document->SetPage(params.page_number,
-    metafile.release(),
-    params.actual_shrink,
-    params.page_size,
-    params.content_area);
+                    metafile.release(),
+#if defined(OS_WIN)
+                    params.actual_shrink,
+#endif  // OS_WIN
+                    params.page_size,
+                    params.content_area);
 
   ShouldQuitFromInnerMessageLoop();
 #else
   if (metafile_must_be_valid) {
     scoped_refptr<base::RefCountedBytes> bytes = new base::RefCountedBytes(
         reinterpret_cast<const unsigned char*>(shared_buf.memory()),
         params.data_size);
 
     if (!pdf_to_emf_converter_)
       pdf_to_emf_converter_ = PdfToEmfConverter::CreateDefault();
@@ skipping 351 matching lines @@
   scoped_refptr<printing::PrinterQuery> printer_query;
   printer_query = queue_->PopPrinterQuery(cookie);
   if (!printer_query)
     return;
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&PrinterQuery::StopWorker, printer_query.get()));
 }
 
 }  // namespace printing