Remove print preview scaling flag

chrome/test/data/webui/print_preview.js

 // 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.
 
 GEN('#include "base/feature_list.h"');
 GEN('#include "chrome/common/chrome_features.h"');
 
 /**
  * Test fixture for print preview WebUI testing.
  * @constructor
@@ skipping 43 matching lines @@
   /** @override */
   accessibilityIssuesAreErrors: true,
 
   /** @override */
   isAsync: true,
 
   /**
    * @override
    */
   testGenPreamble: function() {
-    // Enable print scaling and print as image for tests.
+    // Enable print as image for tests on non Windows/Mac.
+    GEN('#if !defined(OS_WINDOWS) && !defined(OS_MACOSX)');
     GEN('  base::FeatureList::ClearInstanceForTesting();');
     GEN('  std::unique_ptr<base::FeatureList>');
     GEN('      feature_list(new base::FeatureList);');
-    GEN('  char enabled_features[128] = {0};');
-    GEN('  strcpy(enabled_features, features::kPrintScaling.name);');
-    GEN('#if !defined(OS_WINDOWS) && !defined(OS_MACOSX)');
-    GEN('  strcat(strcat(enabled_features, ","), ');
-    GEN('      features::kPrintPdfAsImage.name);');
+    GEN('  feature_list->InitializeFromCommandLine(');
+    GEN('      features::kPrintPdfAsImage.name, std::string());');
+    GEN('  base::FeatureList::SetInstance(std::move(feature_list));');
     GEN('#endif');
-    GEN('  feature_list->InitializeFromCommandLine(');
-    GEN('      enabled_features, std::string());');
-    GEN('  base::FeatureList::SetInstance(std::move(feature_list));');
   },
 
   /**
    * Stub out low-level functionality like the NativeLayer and
    * CloudPrintInterface.
    * @this {PrintPreviewWebUITest}
    * @override
    */
   preLoad: function() {
     window.addEventListener('DOMContentLoaded', function() {
@@ skipping 1266 matching lines @@
   // increments by 1 for each startGetPreview call it makes. It should only
   // make one such call during initialization or there will be a race; see
   // crbug.com/666595
   expectEquals(printPreview.previewArea_.previewGenerator_.inFlightRequestId_,
     -1);
   this.setInitialSettings();
   expectEquals(printPreview.previewArea_.previewGenerator_.inFlightRequestId_,
     0);
   testDone();
 });