Remove print preview scaling flag

chrome/browser/flag_descriptions.h

 // Copyright 2017 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_FLAG_DESCRIPTIONS_H_
 #define CHROME_BROWSER_FLAG_DESCRIPTIONS_H_
 
 // Includes needed for macros allowing conditional compilation of some strings.
 #include "build/build_config.h"
 #include "build/buildflag.h"
@@ skipping 116 matching lines @@
 
 //  Print Preview features
 
 // Name for the flag to add the option to print PDFs as images to print preview.
 extern const char kPrintPdfAsImageName[];
 
 // Description for the flag to add the option to print PDFs as images in print
 // preview.
 extern const char kPrintPdfAsImageDescription[];
 
-// Name for the flag to add the print scaling feature to print preview.
-extern const char kPrintScalingName[];
-
-// Description for the flag to add the print scaling feature to print preview.
-extern const char kPrintScalingDescription[];
-
 // Name of the 'Native Client' lab.
 extern const char kNaclName[];
 
 #if defined(OS_ANDROID)
 
 // Mobile: Description of the 'Native Client' lab.
 extern const char kNaclDescription[];
 
 #endif  // defined(OS_ANDROID)
 
@@ skipping 3126 matching lines @@
 extern const char kEnableCopylessPasteName[];
 
 // Description of the flag that enables Copyless Paste.
 extern const char kEnableCopylessPasteDescription[];
 
 #endif  // defined(OS_ANDROID)
 
 }  // namespace flag_descriptions
 
 #endif  // CHROME_BROWSER_FLAG_DESCRIPTIONS_H_