Remove print preview scaling flag

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

 // 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.
 
 #include "chrome/browser/ui/webui/print_preview/print_preview_ui.h"
 
 #include <map>
 #include <utility>
 #include <vector>
 
@@ skipping 400 matching lines @@
   source->OverrideContentSecurityPolicyScriptSrc(
       base::StringPrintf("script-src chrome://resources 'self' 'unsafe-eval' "
                          "chrome-extension://%s;",
                          extension_misc::kPdfExtensionId));
   source->OverrideContentSecurityPolicyChildSrc("child-src 'self';");
   source->DisableDenyXFrameOptions();
   source->OverrideContentSecurityPolicyObjectSrc("object-src 'self';");
   source->AddLocalizedString("moreOptionsLabel", IDS_MORE_OPTIONS_LABEL);
   source->AddLocalizedString("lessOptionsLabel", IDS_LESS_OPTIONS_LABEL);
 
-  bool scaling_enabled = base::FeatureList::IsEnabled(features::kPrintScaling);
-  source->AddBoolean("scalingEnabled", scaling_enabled);
-
   bool print_pdf_as_image_enabled = base::FeatureList::IsEnabled(
       features::kPrintPdfAsImage);
   source->AddBoolean("printPdfAsImageEnabled", print_pdf_as_image_enabled);
-
 #if defined(OS_CHROMEOS)
   bool cups_and_md_settings_enabled =
       !base::CommandLine::ForCurrentProcess()->HasSwitch(
           ::switches::kDisableNativeCups);
   source->AddBoolean("showLocalManageButton", cups_and_md_settings_enabled);
 #else
   source->AddBoolean("showLocalManageButton", true);
 #endif
   return source;
 }
@@ skipping 255 matching lines @@
 }
 
 void PrintPreviewUI::SetSelectedFileForTesting(const base::FilePath& path) {
   handler_->FileSelected(path, 0, NULL);
 }
 
 void PrintPreviewUI::SetPdfSavedClosureForTesting(
     const base::Closure& closure) {
   handler_->SetPdfSavedClosureForTesting(closure);
 }